Cold-Induced Sweating Syndrome 1 (CISS1)

Cold-induced sweating syndrome 1 (CISS1) is a very rare genetic disease that affects how the body controls temperature and how the nerves and face develop. In this condition, a person sweats a lot when the air is cool, especially on the face, chest, arms, and upper body, but may sweat much less in warm weather. This sweating in the cold is called “paradoxical” because it is the opposite of what normally happens. CISS1 also causes problems in newborn babies, such as weak facial muscles, trouble sucking and swallowing, and episodes of very high fever.

Cold-induced sweating syndrome 1 (CISS1) is a very rare, inherited (autosomal recessive) nervous-system disorder in which children later develop profuse sweating when they are in cool air, while often sweating very little in heat. In infancy it usually appears as Crisponi syndrome with feeding difficulty, breathing problems, abnormal muscle contractions, and distinctive facial and skeletal features. The condition is mainly caused by mutations in the CRLF1 gene, which disrupt a signalling pathway important for autonomic (automatic) control of body temperature and muscle tone. [1]

As children survive the dangerous first years, the picture gradually changes. Muscle spasms and fevers improve, but cold-induced sweating, scoliosis (curved spine), and difficulties with temperature control become the main long-term problems. Most affected individuals have normal intelligence if they are well supported medically and nutritionally, so the treatment plan focuses on safety, comfort, and function rather than “curing” the gene change, which is not yet possible. [2]

CISS1 is caused by harmful changes (mutations) in a gene called CRLF1. This gene helps make a protein that works in a signaling pathway important for the development of the nervous system, especially the part that controls sweating and other automatic body functions. When CRLF1 does not work well, the signals to sweat glands and some nerves become abnormal, leading to cold-induced sweating and other features of the syndrome.

Doctors now know that the same basic genetic problem can show two main clinical pictures over life. In early life, many babies show features known as Crisponi syndrome, with severe muscle spasms, feeding problems, and fevers. Later in childhood or adolescence, the same individuals may show the classic pattern of cold-induced sweating and spine problems. Because of this, many experts describe CISS1 and Crisponi syndrome as different ages or phases of one disease spectrum.

Other names

CISS1 is known by several other names in medical books and research papers. These names can be confusing, but they all describe the same or closely related conditions.

Other names (aliases)

• Crisponi / cold-induced sweating syndrome type 1

• Crisponi–CISS1 spectrum

• CRLF1-related cold-induced sweating syndrome

• Cold-induced sweating syndrome, type 1

• Cold-induced sweating syndrome including Crisponi syndrome

These names reflect that the disorder is linked to CRLF1 gene mutations and that symptoms change with age.

Types of cold-induced sweating syndrome

There are two main genetic forms of cold-induced sweating syndrome:

1. Cold-induced sweating syndrome type 1 (CISS1)
   This type is caused by harmful changes in the CRLF1 gene on chromosome 19. It is inherited in an autosomal recessive way, meaning a child must get one faulty gene copy from each parent. CISS1 is the focus of this article.

2. Cold-induced sweating syndrome type 2 (CISS2)
   This related type is caused by mutations in another gene called CLCF1 on chromosome 11. The clinical picture can be similar, with cold-induced sweating and overlapping early-life features. However, when doctors say CISS1, they specifically mean the CRLF1-related form.

Causes and risk factors

1. Homozygous CRLF1 gene mutations
   In many patients with CISS1, both copies of the CRLF1 gene carry the same harmful change (homozygous mutation). Because both copies are damaged, the body cannot make normal CRLF1 protein, which disrupts signaling in developing nerves and sweat glands.

2. Compound heterozygous CRLF1 mutations
   Some patients have two different mutations in CRLF1, one from each parent. This is called compound heterozygosity. Even though the mutations are not identical, the combined effect still leads to loss of normal CRLF1 function and causes CISS1.

3. Loss of CRLF1 protein function
   The CRLF1 protein normally works as a partner in a cytokine (signaling) complex. Mutations can change its shape or stability so that it cannot bind correctly with its partner proteins. As a result, the signaling pathway fails, and nervous system development is disturbed.

4. Disrupted CRLF1–CLCF1 signaling complex
   CRLF1 teams up with a protein called CLCF1 to form a secreted complex that signals through the ciliary neurotrophic factor receptor (CNTFR). When CRLF1 is defective, this complex cannot signal properly to developing neurons and sweat glands, leading to abnormal sweating patterns and craniofacial features.

5. Abnormal development of the autonomic nervous system
   The autonomic nervous system controls involuntary actions such as heart rate, blood pressure, and sweating. Studies of CISS1 patients show combined central and peripheral autonomic failure, which explains the abnormal sweating and temperature control.

6. Abnormal development of sweat gland innervation
   Research suggests that CRLF1-related signaling is important for the connection between nerves and sweat glands. When this process is disturbed, sweat glands may respond paradoxically, producing sweat in cold environments but not appropriately in heat.

7. Autosomal recessive inheritance pattern
   CISS1 follows an autosomal recessive pattern. This means both parents are usually healthy carriers with one faulty CRLF1 gene copy and one normal copy. When a child inherits the faulty copy from both parents, the child develops CISS1.

8. Parental consanguinity (parents related by blood)
   In several reported families, parents were related (for example, first cousins). When parents share more genes, the chance that both carry the same rare CRLF1 mutation is higher, increasing the risk of a child with CISS1.

9. Founder mutations in specific populations
   Some populations, such as certain Mediterranean and Turkish groups, have recurrent CRLF1 mutations that appear again and again. This pattern suggests founder mutations passed down from common ancestors, raising local disease frequency.

10. Missense mutations in CRLF1
    Missense mutations change one amino acid in the CRLF1 protein. Depending on the location, they can disturb the protein’s shape, folding, or interaction with partner molecules, leading to partial or complete loss of function and CISS1.

11. Nonsense and frameshift mutations
    Nonsense and frameshift mutations create a short, incomplete CRLF1 protein or trigger its destruction. These severe mutations often remove most of the protein’s activity and are strongly associated with the disease.

12. Splice-site mutations
    Some CRLF1 mutations occur at splice sites, the regions that help the cell cut and join pieces of RNA. Faulty splicing can lead to missing or altered sections of the protein, which may prevent normal signaling and cause disease.

13. Reduced secretion of mutant CRLF1 protein
    Laboratory work has shown that some mutant CRLF1 proteins are made inside cells but are not secreted properly. Without secretion, they cannot reach their targets or form the normal signaling complex, contributing to disease severity.

14. Lower stability of CRLF1 variants
    Certain missense changes make CRLF1 less stable so it breaks down more quickly. The body then has less functional protein available, which can worsen the clinical features of CISS1.

15. Disturbed CNTFR (ciliary neurotrophic factor receptor) signaling
    The CRLF1–CLCF1 complex normally signals through the CNTFR system to support neuron survival and maturation. When this signaling is impaired, neurons that control facial muscles and sweating may not develop or function correctly.

16. Abnormal craniofacial development
    The same pathways that control neuron growth also affect craniofacial development. This helps explain the narrow face, high-arched palate, and other distinctive facial traits seen in CISS1 patients.

17. Abnormal thermoregulation pathways
    Thermoregulation depends on brain centers and peripheral nerves. Studies in CISS1 show mismatched signals between the brain and sweat glands, creating the paradoxical pattern of sweating with cold exposure and limited sweating with heat.

18. Genetic heterogeneity between CISS1 and CISS2
    Reports of patients with similar symptoms but different underlying genes (CRLF1 vs CLCF1) show that different molecular defects can disturb the same pathway. Understanding this helps doctors classify type 1 correctly and guide genetic testing.

19. Rare de novo mutations
    Although most patients inherit mutations from carrier parents, de novo (new) CRLF1 mutations can occasionally arise in the egg or sperm or early embryo. These are rare but possible causes when there is no family history.

20. Possible modifier genes and environment
    Patients with similar CRLF1 mutations can show different severity, suggesting that other genes and general health may modify the phenotype. Environmental temperature does not cause CISS1, but it strongly triggers symptoms because the underlying thermoregulation system is already abnormal.

Symptoms and signs

1. Cold-induced profuse sweating
   The most typical symptom is heavy sweating on the face, chest, arms, and upper body when the room is cool, often between about 7–22°C. This sweating can soak clothes and cause shivering at the same time.

2. Reduced sweating in heat
   Many patients sweat much less than normal in warm environments. This makes heat difficult to tolerate and can increase the risk of overheating, because the body cannot cool itself properly.

3. Neonatal facial weakness
   In early life, babies often have weak facial muscles. Their face may look expressionless, and they may not move their lips well. This weakness makes feeding and communication more difficult.

4. Feeding difficulty and poor sucking
   Newborns with CISS1 commonly have trouble sucking and swallowing. They may choke, cough, or take a very long time to finish feeds, and sometimes need tube feeding to gain enough weight.

5. Recurrent high fevers in infancy
   Many infants show repeated episodes of very high body temperature without clear infection. These fevers are related to the poor control of body temperature and may be life-threatening in the first year if not managed carefully.

6. Exaggerated startle response
   Babies may have strong muscle contractions of the face and body in response to touch or crying, called an exaggerated startle. This can look like a seizure or tetanic spasm and can be frightening for parents.

7. Trismus (jaw stiffness) and abundant salivation
   Tight jaw muscles can keep the mouth partly closed (trismus), and saliva may build up because swallowing is difficult. Parents may notice drooling and choking episodes in infancy.

8. Opisthotonus (arching of the back)
   During severe muscle contractions, the baby’s back may arch, and the head may bend backward. This posture, called opisthotonus, reflects strong involuntary muscle spasms linked to the nervous system problem.

9. Distinctive facial features
   Many patients have a narrow face, high-arched palate, low-set or rotated ears, and sometimes a short nose or other subtle differences. These features, together with the neurologic signs, help clinicians recognize the syndrome.

10. Flexion deformities and camptodactyly
    Some children have bent elbows and fingers that they cannot fully straighten. The fingers may be held in a bent position (camptodactyly), and joints can be stiff. These contractures reflect abnormal muscle and connective tissue development.

11. Scoliosis and kyphosis (curved spine)
    In older children and teenagers, the spine may curve sideways (scoliosis) and forward (kyphosis). When both directions are involved, doctors may use the term kyphoscoliosis. These curves can worsen with growth and may require orthopedic care.

12. Muscle stiffness and cramps
    Some patients report stiffness, cramps, or abnormal limb positions, especially during startle episodes or temperature changes. These symptoms are linked to altered motor neuron and muscle control.

13. Autonomic symptoms (blood pressure and heart rate changes)
    Because the autonomic nervous system is affected, some patients show abnormal blood pressure responses, dizziness on standing, or other subtle autonomic signs, although cardiovascular reflexes can also be close to normal in some cases.

14. Heat and cold intolerance
    Patients often feel uncomfortable in both hot and cold weather. Cold exposure triggers intense sweating and shivering, while heat may cause fatigue or overheating because sweating is inadequate where it is most needed.

15. Long-term normal intelligence in many survivors
    For individuals who survive the dangerous early years, intellectual development is often near normal, although some may have learning or motor difficulties. This pattern means that early recognition and supportive care can allow a relatively good long-term quality of life.

Diagnostic tests

Doctors diagnose CISS1 by combining clinical features, family history, and special tests. Because the condition is rare, they also use tests to rule out other diseases that may look similar.

Physical examination tests

1. General physical examination and growth check
   The doctor first examines the whole body, checking weight, height, head size, and body proportions. They look for signs like narrow face, bent fingers, or spinal curves and ask about sweating in cold environments. These findings can raise strong suspicion of CISS1.

2. Observation of sweating at different room temperatures
   A simple but important test is to observe the patient in a cool room, then in a warmer room. In CISS1, heavy sweating appears mainly when the room is cool, especially on the upper body, while sweating may be reduced in heat. This paradoxical response is a key clue.

3. Neurologic examination of tone and reflexes
   The doctor checks muscle tone (stiffness or floppiness), tendon reflexes, and coordination. In infants, they look for exaggerated startle, opisthotonus, and abnormal limb positions. These signs help confirm that the nervous system, not the muscles alone, is affected.

4. Craniofacial and oral examination
   A careful look at the face and mouth can show a high-arched palate, narrow face, low-set ears, and weak facial movements. These features, together with feeding difficulty and salivation, support the diagnosis of the Crisponi/CISS1 spectrum.

5. Spine and joint examination
   Over time, the doctor checks for scoliosis, kyphosis, and joint contractures. Measuring curve angles and joint range of motion helps decide when to involve orthopedic specialists and whether bracing or surgery might be needed.

Manual and bedside tests

6. Cold provocation test
   Under supervision, the patient is exposed to a controlled cool environment for a short period. The doctor watches for profuse sweating on the face, trunk, and arms along with shivering. Documentation of sweating in cold but not at neutral temperatures supports CISS1.

7. Warm challenge test
   In some centers, clinicians also observe the patient in a warm environment or during mild exercise. Limited sweating in heat, compared with strong sweating in cold, further confirms that thermoregulation is reversed.

8. Lying-to-standing blood pressure and heart rate test
   The doctor measures blood pressure and pulse while the patient is lying down and again after standing. Abnormal drops in blood pressure or unusual heart rate changes point to autonomic involvement, which fits with the known autonomic failure in CISS1.

9. Bedside cranial nerve testing
   Simple bedside checks of eye movements, facial expression, chewing, and swallowing can show weakness or poor coordination. These tests are important in infants with feeding difficulty and in older patients with subtle facial weakness.

Laboratory and pathological tests

10. Basic blood tests (screening)
    Doctors often order complete blood count, electrolytes, and tests for infection to rule out more common causes of fever, poor feeding, or failure to thrive. While these tests are usually normal or non-specific in CISS1, they help exclude other serious conditions in sick infants.

11. Targeted CRLF1 genetic testing
    The most decisive test is DNA sequencing of the CRLF1 gene. Finding two disease-causing mutations (homozygous or compound heterozygous) confirms the diagnosis of CISS1. This test also allows carrier testing for family planning.

12. Gene panel or exome sequencing for related disorders
    In some patients, doctors use larger gene panels or exome sequencing that include CRLF1, CLCF1, and other genes tied to autonomic or craniofacial disorders. This approach is helpful when the clinical picture is complex or when a single-gene test is negative but suspicion remains high.

13. Skin biopsy of sweat glands and small nerve fibers
    Skin biopsy can be done to examine sweat glands and the small nerve fibers that supply them. In reported CISS cases, sweat glands may look normal, and nerve fiber counts may be near normal, suggesting that the main problem is in signaling, not in gland structure. This helps distinguish CISS1 from other sweat gland diseases.

14. Nerve or muscle biopsy in selected cases
    Occasionally, a nerve (such as the sural nerve) or muscle biopsy is performed to look for neuropathy or myopathy. In CISS1, these biopsies are often surprisingly normal or show only mild changes, again pointing to a specific autonomic and developmental problem rather than a general nerve degeneration.

Electrodiagnostic tests

15. Nerve conduction studies
    Nerve conduction tests measure how quickly electrical signals travel along peripheral nerves. In CISS1, large fiber conduction may be near normal, but the study helps rule out other neuropathies that could also cause autonomic or motor symptoms.

16. Electromyography (EMG)
    EMG uses fine needles to record electrical activity inside muscles. It can show whether muscle stiffness is due to nerve or muscle problems. In CISS1, EMG may show only mild or non-specific findings, supporting the idea of a selective autonomic and developmental defect.

17. Autonomic function tests (heart rate and sweating tests)
    Specialized labs may perform autonomic tests like Valsalva maneuver, heart rate variability, or sympathetic skin response. These tests evaluate how the autonomic nervous system regulates heart and sweat responses, and can demonstrate combined central and peripheral autonomic failure in CISS1.

Imaging tests

18. Spine X-ray or MRI
    Imaging of the spine is important in children and teens with suspected scoliosis or kyphosis. X-rays measure the degree of curvature, and MRI can show spinal cord or structural problems. In CISS1, curves can be significant and may require long-term follow-up.

19. Brain MRI
    Brain MRI is often normal in CISS1, but doctors may order it to rule out other structural brain conditions that could explain abnormal movements, seizures, or developmental delay. A normal brain MRI, in the presence of the characteristic clinical and genetic features, supports the diagnosis.

20. Chest and skeletal imaging
    Radiographs of the chest and other bones may be used to assess chest shape, ribs, and limb alignment, especially in patients with severe spinal deformity or contractures. These images help plan physical therapy, bracing, or surgery when needed.

Non-pharmacological (non-drug) treatments

1. Temperature-smart clothing and layering
   Parents can dress the child in light, breathable layers so they can be quickly removed when sweating starts in cool environments, and added when the child is at risk of getting chilled. The goal is to reduce prolonged wet, cold skin (which can lead to infections) while avoiding overheating in warm rooms. Simple strategies like using absorbent undershirts, quick-dry fabrics and frequent clothing changes can dramatically reduce skin irritation, chills and discomfort. [1]

2. Careful environmental control at home and school
   Families often keep the indoor temperature in a “neutral” zone (for example 22–24 °C) and avoid drafts or very cool air that trigger sweating. Fans, gentle air-conditioning, and good ventilation help prevent stuffiness and high humidity, which can worsen skin problems. Teachers and caregivers may need clear written instructions about ideal temperatures and when to move the child to a different room. [2]

3. Regular gentle physiotherapy and stretching
   Physiotherapists can design daily exercises to reduce joint contractures, improve posture, and support breathing muscles. This is especially important because many children with CISS1 have early muscle contractions, camptodactyly (bent fingers) and later scoliosis. Gentle stretching, positioning, and strengthening can delay deformities and make future surgery easier or sometimes unnecessary. [3]

4. Occupational therapy for daily function
   Occupational therapists help adapt feeding, dressing, writing, and play so that the child is independent and safe despite muscle stiffness or abnormal sweating. They may suggest special grips, adaptive cutlery, seating systems and school tools, and train parents in safe lifting and positioning. This reduces caregiver strain and can improve quality of life. [4]

5. Speech and swallow therapy
   In infancy, feeding and swallowing are often dangerous because of facial weakness, abnormal muscle contractions and laryngospasm. Speech-language therapists teach safer swallowing positions, pacing, and sometimes thickened liquids. They also support early communication and later speech if facial movements are affected. This can reduce aspiration (food going “down the wrong way”) and hospital admissions. [5]

6. Nutrition support and growth monitoring
   Many infants need high-calorie feeds, special formulas, or tube feeding to grow. A dietitian tracks weight, length and micronutrient status, and adjusts feeding plans to match changing needs. Good nutrition supports immune function, wound healing after surgery, and overall development, especially in children who sweat a lot and can lose fluids and salts. [6]

7. Hydration and electrolyte management
   Because sweating is triggered in cool conditions and can be very profuse, children may lose significant fluid and sodium. Families are often taught to recognise signs of dehydration and to offer frequent small drinks, sometimes with electrolyte solutions, particularly after episodes of intense sweating or illness. This helps maintain blood pressure and reduces dizziness and fatigue. [7]

8. Skin care and prevention of rashes
   Continuous sweating on the face, neck, chest and arms can cause rashes, fungal infections, and skin breakdown. Regular gentle cleansing, careful drying, and use of barrier creams or non-perfumed emollients can protect the skin. Dermatology review is useful if there is scaling or eczema-like changes described in some patients. [8]

9. Postural management and seating systems
   Progressive thoracolumbar kyphoscoliosis is common and may require early bracing and custom seating to maintain balance and protect lung function. Special chairs, standing frames and night-time supports keep the spine aligned as much as possible. This can delay the progression of curvature and make daily activities less tiring. [9]

10. Bracing for spine and limbs
    Orthopaedic teams may use spinal braces and splints for elbows, hands or feet to reduce contractures and support weaker muscles. Bracing is typically combined with physiotherapy. For some children this can postpone or reduce the scale of later spine surgery. [10]

11. Respiratory monitoring and sleep support
    In infancy, some children need monitoring for breathing pauses, laryngospasm and aspiration. Nocturnal pulse oximetry or sleep studies may be recommended. Safe sleep positioning, suction equipment, and sometimes non-invasive ventilation (CPAP/BiPAP) can be considered if breathing is unstable. [11]

12. Emergency plans for hyperthermia in infancy
    Early in life, episodes of unexplained high fever and hyperthermia can be life-threatening. Families are given clear emergency plans: how to cool the child safely, when to seek hospital care, and which warning signs (breathing difficulty, reduced consciousness) require urgent help. Written action plans for emergency teams improve safety. [12]

13. Education and psychological support for family
    CISS1 is rare and stressful. Genetic counselling helps families understand inheritance and future pregnancy options, while psychology support can address anxiety, guilt, and burnout. Peer support groups (even small online groups) help families share practical tips on managing sweating and disability. [13]

14. School and workplace accommodations
    Children and later adults may need flexible clothing rules, access to fans, permission to leave class to wash and change, and seating away from drafts. Teachers should understand that cold air can trigger sweating and discomfort, and that the condition is not under voluntary control. [14]

15. Behavioural strategies for stress-triggered sweating
    Sweating is not only triggered by cold but also by nervousness or emotional stress. Simple relaxation techniques, predictable routines, and psychological therapies (CBT, coping skills training) may help reduce stress-related triggers. This does not cure the disease but can modestly reduce symptom flares. [15]

16. Avoidance of extreme heat and dehydration
    Although the name emphasises cold-induced sweating, many patients sweat poorly in heat and feel overheated. Families should avoid very hot environments, direct sun exposure, and vigorous exertion in hot weather, and provide shade, fluids and rest. This helps prevent heat exhaustion. [16]

17. Regular dental and oral care
    Abnormal facial muscle control and drooling can increase risk of dental problems. Regular dental visits, fluoride, and help with brushing decrease cavities and gum disease. Good oral health also reduces infection risk in medically fragile children. [17]

18. Vaccination and infection-prevention routines
    Children with severe early-life complications may be more vulnerable to infections because of hospitalisations, feeding tubes or surgeries. Staying up to date with routine vaccines, plus careful hand-hygiene and quick treatment of respiratory infections, helps protect them during critical years. [18]

19. Multidisciplinary clinic follow-up
    Because CISS1 affects many systems, best care often comes from a coordinated team: neurology, genetics, orthopaedics, pulmonology, physiotherapy, nutrition, and psychology. Regular joint reviews make sure treatments do not conflict and that new problems are picked up early. [19]

20. Genetic counselling for the wider family
    Once a CRLF1 mutation is confirmed, extended family members may wish to test for carrier status before having children. Genetic counselling explains risks (25% chance for each pregnancy when both parents are carriers) and options such as prenatal or pre-implantation testing. [20]

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Drug treatments (symptom-based, mainly off-label)

Key point: No medicine is currently approved specifically for “cold-induced sweating syndrome 1”. Drugs are used off-label to control sweating, pain, muscle spasms, sleep, and mood. Doses below are typical adult ranges only and must be adjusted by specialists, especially in children. [1]

1. Clonidine – central α2-agonist
   Clonidine is an antihypertensive that acts on α2-adrenergic receptors in the brain to reduce sympathetic outflow. According to FDA labelling, oral doses for other conditions often start around 0.1 mg twice daily in adults, with cautious adjustments. [2] In CISS1, small bedtime or divided doses may reduce cold-induced sweating and startle responses by calming overactive sympathetic pathways, but can cause low blood pressure, fatigue and dry mouth. [2]

2. Extended-release clonidine (e.g., KAPVAY/other ER brands)
   Extended-release clonidine provides smoother 24-hour levels, which may help night-time sweating and behavioural issues with fewer peaks and troughs. FDA labels for ADHD recommend starting at 0.1 mg at bedtime and gradually titrating. [3] In CISS1, specialists sometimes adapt this pattern, monitoring blood pressure, heart rate, sedation and rebound hypertension if abruptly stopped. [3] [3]

3. Amitriptyline – tricyclic antidepressant
   Amitriptyline is a tricyclic antidepressant with strong anticholinergic and sedative effects. FDA labelling describes its use in depression with typical adult doses from 25–150 mg/day, usually at night. [4] In CISS1, low evening doses may help neuropathic pain, sleep and sweating by dampening central pain and autonomic pathways, but side effects include dry mouth, constipation, urinary retention, weight gain and cardiac conduction problems. [4] [4]

4. Combination of clonidine plus low-dose amitriptyline
   Case reports in Crisponi/CISS spectrum suggest that a combination of clonidine and low-dose amitriptyline can have a synergistic effect on cold-induced sweating, probably by jointly reducing sympathetic firing and modulating central pain/autonomic circuits. [5] Doctors must watch carefully for additive blood-pressure changes, sedation and cardiac effects, and use the lowest effective doses. [5]

5. Moxonidine (where available)
   Moxonidine is an imidazoline receptor agonist with clonidine-like actions on sympathetic neurons. Some reports describe benefit for cold-induced sweating when clonidine is not tolerated, again through reduction of sympathetic outflow. [6] It is not widely available or FDA-approved in the US, so its use depends on national approvals and specialist experience, with possible side effects including low blood pressure, dry mouth, and dizziness. [6]

6. Glycopyrrolate – anticholinergic
   Glycopyrrolate is an anticholinergic drug that reduces secretions and sweating by blocking muscarinic receptors in sweat glands. FDA labels describe oral tablet and orally disintegrating forms used mainly for peptic ulcer disease and drooling, with adult oral doses often 1–2 mg two or three times daily, using the lowest effective dose. [7] In CISS1, off-label small doses may help generalised sweating, but side effects include dry mouth, constipation, blurred vision, urinary retention and tachycardia. [7]

7. Oxybutynin – anticholinergic for hyperhidrosis
   Oxybutynin, an antimuscarinic approved for overactive bladder, is also used off-label for hyperhidrosis in other conditions. It decreases sweat production through muscarinic receptor blockade. Typical adult doses range from 2.5–5 mg two to three times daily or extended-release preparations once daily, but children need much lower, weight-based dosing. Common side effects are dry mouth, constipation, blurred vision and overheating if sweating becomes too low. [8]

8. OnabotulinumtoxinA (BOTOX) – focal sweating control
   Botulinum toxin type A blocks acetylcholine release at neuromuscular and autonomic junctions. FDA labelling includes an indication for primary axillary hyperhidrosis in adults, using intradermal injections to reduce local sweating. [9] In carefully selected CISS1 patients with very localised, disabling sweating, specialists may use similar injection patterns to treat focal areas (for example, axillae), but must monitor for muscle weakness, swallowing or breathing difficulties, and systemic toxin spread. [9]

9. Propranolol – β-blocker for stress-triggered sweating
   Propranolol is a non-selective β-blocker used for hypertension, arrhythmias and performance anxiety. Hyperhidrosis guidelines mention beta-blockers for some generalised sweating states. [10] In CISS1, low doses before predictable stress (exams, performances) may blunt adrenergic surges that trigger sweating and tachycardia, but can cause low blood pressure, slow heart rate, fatigue and bronchospasm in asthmatics. [10]

10. Gabapentin – neuropathic pain and startle reduction
    Gabapentin modulates calcium channels and reduces excitatory neurotransmitter release. It is commonly used for neuropathic pain and sometimes for exaggerated startle or autonomic dysregulation. In CISS1, night-time dosing may soften pain, spasms and sleep fragmentation. Side effects include dizziness, fatigue, and weight gain. Dosing is highly individualised, starting low and titrating slowly. [11]

11. Baclofen – antispastic agent
    Baclofen is a GABA-B agonist used for muscle spasticity. In children with prominent muscle contractions or painful spasms early in life, low divided doses may help, but can also cause sedation, hypotonia and withdrawal symptoms if stopped abruptly. In CISS1 it is sometimes combined with physiotherapy to ease stretching and daily care. [12]

12. Benzodiazepines (e.g., diazepam, clonazepam)
    These drugs enhance GABA-A signalling and can reduce anxiety, startle responses and muscle rigidity. Short, carefully supervised use in CISS1 may be considered for severe spasms or major procedures. Because they cause sedation, respiratory depression and dependence, specialists keep doses as low and as brief as possible and avoid long-term unsupervised use. [13]

13. Simple analgesics (paracetamol/acetaminophen, ibuprofen)
    Paracetamol and ibuprofen are widely used for pain and fever. In CISS1 they are helpful for musculoskeletal pain, postsurgical pain or intercurrent infections. Dosing must follow paediatric weight-based recommendations and maximum daily limits to avoid liver or kidney damage, and prolonged use without diagnosis should be avoided. [14]

14. Proton pump inhibitors (PPIs) during NSAID use
    If a child with CISS1 needs frequent NSAIDs (like ibuprofen) for pain, doctors may prescribe a PPI such as omeprazole to protect the stomach from ulcers. This is not disease-specific but part of safe long-term pain management. PPIs themselves can cause headache, diarrhoea and, with very long use, nutrient malabsorption, so they should be reviewed regularly. [15]

15. Melatonin for sleep regulation
    Some children with complex neurological conditions benefit from melatonin to regularise sleep–wake cycles. It may indirectly reduce sweating episodes by improving consolidated night-time sleep and lowering stress. Doses are individual and should be guided by a paediatrician; long-term safety appears good but monitoring is still advised. [16]

16. Selective serotonin reuptake inhibitors (SSRIs)
    If an older child or adult with CISS1 develops significant anxiety or depression, an SSRI may be considered. These medicines work by increasing serotonin signalling in the brain and are widely used in general populations. They are not specific treatments for sweating, and some actually increase sweating, so choices must be individualised and closely monitored. [17]

17. Antifungal or antibacterial skin creams
    Because constant sweating can lead to fungal or bacterial skin infections, topical clotrimazole, miconazole, or mild antibiotic creams may be used under dermatology supervision. These do not treat the underlying syndrome but help keep skin healthy and comfortable. Overuse, however, can lead to resistance or irritation. [18]

18. Topical aluminium chloride antiperspirants
    Strong prescription antiperspirants containing aluminium chloride can reduce sweating in limited areas such as underarms or palms. They work by blocking sweat ducts. In CISS1, they may be added to other systemic treatments but can cause local skin irritation and should be used on dry, unbroken skin at night. [19]

19. Topical anticholinergic wipes or gels (where available)
    In some countries, topical glycopyrronium or similar products are used for localised hyperhidrosis. They provide an anticholinergic effect mainly at the skin, with less systemic exposure. They are not studied in CISS1 but might be considered for focal areas, watching for dry mouth, blurred vision or urinary retention as possible systemic side effects. [20]

20. Short-term antibiotics when indicated
    Children with feeding tubes, surgeries or recurrent respiratory infections may sometimes need antibiotics. These drugs do not treat CISS1 itself but are important for managing complications that can be more dangerous in medically fragile children. Doctors carefully choose spectrum, dose and duration based on local guidelines and culture results. [21]

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Dietary molecular supplements

Evidence for specific supplements in CISS1 is very limited. These ideas are general supportive measures seen in complex neurological conditions and must be discussed with a specialist dietitian. [1]

1. Balanced multivitamin / multimineral
   A broad multivitamin can fill common gaps in children who eat poorly because of feeding difficulties. Typical doses follow age-appropriate recommendations on the pack; “megadoses” are not helpful and can be harmful. The aim is to support normal immune function, bone health and tissue repair, especially in children who sweat a lot or have had multiple surgeries. [2]

2. Vitamin D and calcium
   Due to limited mobility, skeletal problems and possible long-term anticonvulsant or PPI use, vitamin D and calcium status should be checked. Supplement doses depend on blood levels and age. Correcting deficiency supports bone mineralisation, muscle function and possibly immune defence, which is important in children with scoliosis and respiratory compromise. [3]

3. Omega-3 fatty acids (fish oil or algal oil)
   Omega-3 supplements provide EPA and DHA, which may support brain health, reduce low-grade inflammation and help lipid profiles. Doses are usually based on body weight (for example 10–20 mg/kg of combined EPA/DHA, up to standard paediatric limits). They can thin the blood slightly, so doctors may adjust doses before surgery. [4]

4. Probiotics
   Probiotics may support gut health in children frequently on antibiotics or with tube feeding. Specific strains and doses vary; products are usually given once daily in food or formula. Evidence is mixed, so they are used mainly to reduce antibiotic-associated diarrhoea and improve stool regularity rather than as a core CISS1 treatment. [5]

5. Electrolyte solutions (oral rehydration)
   Rather than a classic “supplement pill”, properly balanced oral rehydration solutions help replace sodium, potassium and glucose after heavy sweating or vomiting. They support circulation and prevent dehydration better than plain water alone. The volume and frequency depend on age, weight and amount of fluid lost. [6]

6. Iron (if deficient)
   If blood tests show iron-deficiency anaemia due to poor intake or frequent blood tests/surgeries, oral iron drops or tablets may be prescribed for several months. Correcting anaemia can improve energy, growth and thermoregulation. Too much iron, however, is toxic, so supplements must always be supervised and monitored with repeat tests. [7]

7. Vitamin B12 and folate (if low)
   Children with restricted diets or malabsorption can develop macrocytic anaemia from low B12 or folate. Blood levels guide dosing (oral or injectable). Normalising these vitamins supports red blood cell production, neurologic function and overall vitality, which is especially important in a chronic rare disease. [8]

8. Zinc (if deficient)
   Zinc deficiency can impair immunity and wound healing. Where confirmed, short-term zinc supplementation aligned with paediatric guidelines may be useful, especially around surgery. Because excessive zinc can interfere with copper metabolism, it should not be taken in high doses without laboratory monitoring. [9]

9. Protein-energy supplements
   High-energy, high-protein oral or tube-feeding formulas may be needed in children who struggle to meet calorie and protein needs by mouth. These products support growth, muscle maintenance and immune function. The choice of formula, volume per feed and feeding schedule are adjusted by a dietitian according to the child’s tolerance and growth charts. [10]

10. Antioxidant-rich foods rather than pills
    Instead of high-dose antioxidant tablets, most experts prefer fruit and vegetable-rich diets, providing vitamin C, E, carotenoids and polyphenols naturally. These support general cellular health and may help respond to stress. For children with feeding issues, purees or fortified smoothies are often used to achieve this. [11]

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Immunity-booster / regenerative / “stem cell”–type drugs

1. No approved stem-cell drug for CISS1
   At present, there is no FDA-approved stem-cell drug or gene therapy specifically for cold-induced sweating syndrome 1. Research on CRLF1-related pathways and neurotrophic cytokines is experimental and mostly in the laboratory. Families should be very cautious of clinics advertising “stem-cell cures” without solid evidence or regulatory approval. [1]

2. Haematopoietic stem-cell transplantation (HSCT)
   HSCT is life-saving for some immune and bone-marrow disorders, but there is no standard indication for CISS1. In theory it could modify immune-related complications, but because CISS1 is primarily a developmental neuro-autonomic disorder, HSCT would not correct the underlying gene defect in nerves. It should be considered only in research or if a second, transplant-indicated disease is present. [2]

3. Mesenchymal stem-cell therapies
   Commercial mesenchymal stem-cell infusions are promoted for many neurological diseases, but high-quality evidence is lacking and risks include infection, emboli and tumour formation. No guideline currently recommends them for CISS1. Any proposed treatment should ideally be within a regulated clinical trial with ethics approval and long-term follow-up. [3]

4. Immune-modulating biologics
   Biologics such as monoclonal antibodies are designed for autoimmune or inflammatory diseases. Because CISS1 is not primarily autoimmune, biologics have no established role. They would only be used if an independent autoimmune condition (for example, juvenile arthritis) co-exists, following disease-specific guidelines. [4]

5. Routine vaccines as the safest “immune booster”
   For children with CISS1, the most evidence-based way to protect immunity is simply to keep up-to-date with routine vaccinations and avoid malnutrition. These proven measures reduce hospitalisations for common infections, which is crucial when respiratory reserve is already challenged by scoliosis or past neonatal problems. [5]

6. Future gene-based therapies (research only)
   Because CISS1 is caused by CRLF1 mutations, future therapies may try to deliver a working copy of the gene or modify signalling pathways downstream. For now this remains experimental in research models only. Families can ask specialists about registries or natural-history studies, which are the first steps towards future trials. [6]

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Surgeries

1. Spinal fusion for severe scoliosis
   Progressive thoracolumbar kyphoscoliosis in adolescence can compromise breathing and sitting balance. When curvature passes surgical thresholds, orthopaedic surgeons may perform spinal fusion with metal rods and bone grafts to straighten and stabilise the spine. The goal is to protect lung function, relieve pain and improve posture, accepting that flexibility is reduced. [1]

2. Prolonged bracing or growth-friendly spine instrumentation
   Before definitive fusion, surgeons may use growing rods or other instrumentation that can be lengthened as the child grows. This reduces deformity progression while allowing some growth. It is usually combined with bracing and careful physiotherapy. [2]

3. Tendon-release or corrective surgery for contractures
   Severe contractures of elbows, hands or feet may require surgical release, tendon lengthening or osteotomies (bone cuts) to improve function and make hygiene and dressing easier. These procedures are planned after extensive physiotherapy and bracing, and are followed by rehabilitation to maintain the new range of motion. [3]

4. Gastrostomy tube placement
   For infants with very unsafe swallowing and poor growth, a gastrostomy tube (feeding tube into the stomach) may be placed surgically or endoscopically. This allows safe delivery of nutrition and medicines while reducing aspiration risk. Many families find that feeding becomes less stressful and growth improves once a tube is in place. [4]

5. Airway interventions in severe laryngospasm
   In rare, very severe cases with recurrent life-threatening laryngospasm, ENT surgeons may consider temporary airway measures (for example tracheostomy). This is unusual but can be life-saving in specific situations. The decision is complex and involves balancing quality of life, family preferences and expected disease course. [5]

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Prevention and self-care strategies

1. Keep room temperatures moderate and avoid cold drafts that trigger sweating. [1]

2. Avoid very hot, humid environments where the child may overheat because normal heat-induced sweating is impaired. [2]

3. Encourage regular, gentle activity rather than long periods of immobility, to protect joints and spine. [3]

4. Maintain good hydration and offer electrolyte fluids after heavy sweating. [4]

5. Use breathable, layered clothing and change damp clothes promptly to prevent skin problems. [5]

6. Keep vaccinations up-to-date and seek early review for respiratory infections. [6]

7. Attend regular follow-up with orthopaedics to detect scoliosis early. [7]

8. Have an emergency plan for fevers, breathing difficulty or unusual episodes of stiffness. [8]

9. Protect mental health with psychological support and social inclusion at school. [9]

10. Join or follow rare-disease networks to stay informed about new research and trials. [10]

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When to see doctors

Families should seek urgent medical help if the child has difficulty breathing, blue lips, repeated choking, severe uncontrolled fever, reduced consciousness, or sudden worsening of spine curvature or pain. [1] Regular scheduled visits with neurology, orthopaedics, pulmonology and nutrition are also important, even when things seem stable, because scoliosis and autonomic symptoms can change silently over time. [1]

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What to eat and what to avoid

1. Prefer a balanced diet rich in fruits, vegetables, whole grains, and adequate protein to support growth and healing. [1]

2. Use high-energy, high-protein supplements if weight gain is poor, as recommended by a dietitian. [2]

3. Offer frequent small meals if large feeds trigger choking or vomiting. [3]

4. Encourage fluid intake across the day, including oral rehydration solutions during or after heavy sweating. [4]

5. Avoid very salty, sugary drinks as the main fluid; they may worsen dehydration or weight gain if used excessively. [5]

6. Limit caffeinated drinks (tea, cola, energy drinks) in older children, as they may affect heart rate, sleep and hydration. [6]

7. Be cautious with “immune-boosting” or “detox” supplements sold online; many have no evidence and may interact with medicines. [7]

8. Avoid extreme “fad diets” that remove whole food groups unless medically indicated (for example, proven allergy). [8]

9. Work closely with a dietitian when introducing or changing tube feeds. [9]

10. During illness or surgery, follow hospital nutrition plans carefully to avoid both under- and over-feeding. [10]

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Frequently asked questions (FAQs)

1. Is cold-induced sweating syndrome 1 the same as Crisponi syndrome?
   Today most experts consider Crisponi syndrome (the severe neonatal form) and CISS1 to be different time phases of the same CRLF1-related disease spectrum. Early life is dominated by muscle contractions, feeding and breathing problems, while later life shows cold-induced sweating and scoliosis. [1]

2. Can children with CISS1 have a normal life span?
   If they survive the dangerous neonatal and early-infant period, many individuals with CISS1 reach childhood and adulthood with relatively stable health, although they may have ongoing disability and require orthopaedic surgery and support. Prognosis depends on severity of early complications and access to specialised care. [2]

3. Is intelligence affected?
   Available reports suggest that many survivors have normal or near-normal intellectual development, especially when seizures, severe hypoxia or major brain injury are avoided. However, motor and communication challenges can hide abilities, so early developmental and educational support is essential. [3]

4. Is CISS1 contagious?
   No. CISS1 is a genetic, autosomal recessive condition. It cannot be “caught” from another person. Two healthy carrier parents have a 25% chance with each pregnancy of having an affected child, a 50% chance of a carrier, and a 25% chance of a non-carrier. [4]

5. Can CISS1 be diagnosed before birth?
   If the family’s CRLF1 mutations are known, prenatal diagnosis or pre-implantation genetic testing is technically possible. These options require genetic counselling, discussion of local laws and personal values, and support for whichever reproductive choices the family makes. [5]

6. Are there specific blood tests or brain scans for CISS1?
   Routine blood tests and imaging are usually normal or non-specific. Diagnosis relies on the clinical picture plus genetic testing showing biallelic (two-copy) CRLF1 mutations (or rarely CLCF1 for CISS2). Sometimes nerve studies are done to evaluate autonomic function, but they are not diagnostic alone. [6]

7. Does every child with CISS1 get scoliosis?
   Not every child, but scoliosis and kyphosis are common complications as children grow. The degree of curvature varies, and early physiotherapy, bracing and regular orthopaedic monitoring help decide if and when surgery is needed. [7]

8. Why does my child sweat in the cold but not in the heat?
   Because CRLF1-related signalling is disrupted, the autonomic nervous system misreads temperature cues and activates sweat glands at inappropriate times. Cold air and emotional stress paradoxically trigger sweating, while heat does not provoke normal cooling responses, making the child feel overheated. [8]

9. Can my child play sports?
   Many children can participate in light to moderate activity with supervision. Activities should avoid extremes of heat or cold and allow frequent rest, fluids and clothing adjustments. Team staff should understand the condition and be able to recognise warning signs of overheating or exhaustion. [9]

10. Will medicines like clonidine cure the disease?
    No. Medicines such as clonidine, amitriptyline or glycopyrrolate control symptoms like sweating, spasms or sleep problems, but they do not change the underlying gene mutation. Over time, doses may need adjusting or switching based on growth and side effects. [10]

11. Are there special precautions for surgery or anaesthesia?
    Yes. Anaesthetists should be informed about CISS1, including breathing history, spine curvature and current medications. Temperature control during surgery, careful airway management, and monitoring for unstable blood pressure or arrhythmias are particularly important. Elective procedures are best done in centres familiar with complex paediatric cases. [11]

12. Can adults with CISS1 work and live independently?
    Some adults with milder forms achieve good independence, employment and relationships, especially when early complications were controlled and orthopaedic issues are managed. Others may need assistance with mobility, personal care or medical coordination. Individual outcomes vary widely. [12]

13. Is pregnancy possible for women with CISS1?
    There is very little published data, but in principle pregnancy is possible. Pre-pregnancy counselling with obstetrics, cardiology and anaesthesia is essential, and close monitoring for respiratory and spinal issues is needed. Genetic counselling helps discuss the 25% recurrence risk if the partner is a carrier. [13]

14. How can families find specialists?
    Because CISS1 is rare, care often centres on tertiary paediatric neurology or genetics clinics and scoliosis centres. Families can ask local paediatricians for referral, and rare-disease organisations may list centres with experience in CRLF1-associated disorders. [14]

15. Where can I learn about new research?
    Useful sources include peer-reviewed journals, clinical-trial registries, and reputable rare-disease databases that track CRLF1-related conditions. Families can ask to join natural-history studies or patient registries, which help researchers understand the disease and design future trials. [15]

Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, geological location, weather and previous medical  history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. Regular check-ups and awareness can help to manage and prevent complications associated with these diseases conditions. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. We always try to ensure that the content is regularly updated to reflect the latest medical research and treatment options. Thank you for giving your valuable time to read the article.

The article is written by Team RxHarun and reviewed by the Rx Editorial Board Members

Last Updated: February 09, 2025.