Paroxysmal Nocturnal Hemoglobinuria (PNH)

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 6 min read
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Paroxysmal nocturnal hemoglobinuria (PNH) is a rare disease in which red blood cells break down earlier than normal. Persons with this disease have blood cells that are missing a gene called PIG-A. This gene allows a substance called glycosyl-phosphatidylinositol (GPI) to help certain proteins stick to...

For severe symptoms, danger signs, pregnancy, child illness, or sudden worsening, seek urgent medical care.

বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

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Article Summary

Paroxysmal nocturnal hemoglobinuria (PNH) is a rare disease in which red blood cells break down earlier than normal. Persons with this disease have blood cells that are missing a gene called PIG-A. This gene allows a substance called glycosyl-phosphatidylinositol (GPI) to help certain proteins stick to cells. Without PIG-A, important proteins cannot connect to the cell surface and protect the cell from substances in the blood...

Key Takeaways

  • This article explains Causes of PNH in simple medical language.
  • This article explains Symptoms of PNH in simple medical language.
  • This article explains Diagnosis of PNH in simple medical language.
  • This article explains Treatment of PNH in simple medical language.
Educational health guideWritten for patient understanding and clinical awareness.
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Emergency safety firstUrgent warning signs are highlighted below.

Seek urgent medical care if you notice

These warning signs are general safety guidance. Local emergency numbers and clinical judgment should always come first.

  • Severe symptoms, breathing difficulty, fainting, confusion, or rapidly worsening illness.
  • New weakness, severe pain, high fever, or symptoms after a serious injury.
  • Any symptom that feels urgent, unusual, or unsafe for the patient.
1

Emergency now

Use emergency care for severe, sudden, rapidly worsening, or life-threatening symptoms.

2

See a doctor

Book a professional medical evaluation if symptoms persist, worsen, recur often, affect daily activities, or occur in a high-risk patient.

3

Learn safely

Use this article to understand possible causes, tests, treatment options, prevention, and questions to ask your clinician.

Paroxysmal nocturnal hemoglobinuria (PNH) is a rare disease in which red blood cells break down earlier than normal. Persons with this disease have blood cells that are missing a gene called PIG-A. This gene allows a substance called glycosyl-phosphatidylinositol (GPI) to help certain proteins stick to cells. Without PIG-A, important proteins cannot connect to the cell surface and protect the cell from substances in the blood called complement. As a result, red blood cells break down too early. The red cells leak hemoglobin into the blood, which can pass into the urine. This can happen at any time, but is more likely to occur during the night or early morning. The disease can affect people of any age. It may be associated with aplastic anemia, myelodysplastic syndrome, or acute myelogenous leukemia. Risk factors, except for prior aplastic anemia, are not known. The outcome varies. Most people survive for more than 10 years after their diagnosis. Death can result from complications such as blood clot formation (thrombosis) or bleeding. In rare cases, the abnormal cells may decrease over time.

Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired disorder that leads to the premature death and impaired production of blood cells. It can occur at any age, but is usually diagnosed in young adulthood. People with PNH have recurring episodes of symptoms due to hemolysis, which may be triggered by stresses on the body such as infections or physical exertion. This results in a deficiency of various types of blood cells and can cause signs and symptoms such as fatigue, weakness, abnormally pale skin (pallor), shortness of breath, and an increased heart rate. People with PNH may also be prone to infections and abnormal blood clotting (thrombosis) or hemorrhage, and are at increased risk of developing leukemia. It is caused by acquired, rather than inherited, mutations in the PIGA gene; the condition is not passed down to children of affected individuals. Sometimes, people who have been treated for aplastic anemia may develop PNH.[1] The treatment of PNH is largely based on symptoms; stem cell transplantation is typically reserved for severe cases of PNH with aplastic anemia or those whose develop leukemia.[2]

Types of PNH

There is only one type of PNH, but it can vary in severity from person to person. Some people may have mild PNH, while others may experience more severe symptoms.

Causes of PNH

The main cause of PNH is a genetic mutation that affects a protein called PIG-A. This mutation makes your red blood cells more susceptible to destruction by your immune system.

Symptoms of PNH

PNH can cause a range of symptoms, including:

  1. Fatigue: Feeling very tired is a common symptom.
  2. Anemia: PNH can lead to low levels of red blood cells, causing anemia.
  3. Dark Urine: Urine may appear dark due to the breakdown of red blood cells.
  4. Abdominal Pain: Pain in the abdomen can occur.
  5. pain in the head or upper neck. সহজ বাংলা: মাথাব্যথা।" data-rx-term="headache" data-rx-definition="Headache means pain in the head or upper neck. সহজ বাংলা: মাথাব্যথা।">Headache: Frequent headaches may be a symptom.
  6. Shortness of Breath: Difficulty breathing can be a sign of anemia.
  7. Pale Skin: Anemia can lead to pale skin.
  8. Thrombosis: Blood clots may form in veins, causing pain and swelling.
  9. Easy Bruising: You may bruise easily.
  10. Jaundice: Yellowing of the skin and eyes due to liver involvement.
  11. Difficulty Swallowing: Swallowing problems can arise if the throat is affected.
  12. Erectile Dysfunction: Men may experience difficulties in sexual function.
  13. Bone Pain: Pain in the bones is possible.
  14. Frequent Infections: Your immune system may be weakened.
  15. Nosebleeds: Nosebleeds can occur.
  16. Dark Circles Under Eyes: These may appear due to fatigue.
  17. Enlarged Spleen: Your spleen may become enlarged.
  18. Joint Pain: Pain and swelling in the joints are possible.
  19. Kidney Problems: PNH can affect kidney function.
  20. Chest Pain: Chest pain may occur due to heart-related complications.

Diagnosis of PNH

To diagnose PNH, doctors use various tests and examinations, including:

  1. Blood Tests: Checking for low red blood cell count, hemoglobin levels, and markers of PNH.
  2. Bone Marrow Biopsy: Examining a small sample of bone marrow to look for PNH-affected cells.
  3. Flow Cytometry: A specialized test to identify PNH cells in your blood.
  4. Urine Tests: Checking for hemoglobin breakdown products in your urine.
  5. Genetic Testing: Identifying the PIG-A gene mutation responsible for PNH.

Treatment of PNH

Treatment for PNH aims to manage symptoms, prevent complications, and improve overall quality of life. Here are some common treatments:

  1. Blood Transfusions: To address anemia and maintain healthy hemoglobin levels.
  2. Medications: Such as eculizumab (Soliris) to reduce red blood cell destruction.
  3. Bone Marrow Transplant: In severe cases, a transplant may be considered.
  4. Immunosuppressive Therapy: To suppress the immune system’s attack on red blood cells.
  5. Anticoagulants: To prevent blood clots in veins.
  6. Pain Management: For bone pain and other discomforts.
  7. Supportive Care: Including nutrition and managing infections.

Medications for PNH

Several drugs can be used to manage PNH and its symptoms. Here are some of them:

  1. Eculizumab (Soliris): Blocks the immune system from destroying red blood cells.
  2. Ravulizumab (Ultomiris): Similar to eculizumab, but with a longer duration of action.
  3. Iron Supplements: To address anemia.
  4. Pain Relievers: Such as acetaminophen for pain management.
  5. Anticoagulants: Like warfarin to prevent blood clots.
  6. Immunosuppressive Drugs: To reduce the immune system’s activity.
  7. Antibiotics: For treating and preventing infections.

Conclusion:

Paroxysmal Nocturnal Hemoglobinuria (PNH) is a complex condition, but understanding its basics can be crucial for those affected and their families. If you suspect you or someone you know has PNH, seek medical advice promptly. With advances in treatment, many people with PNH can lead fulfilling lives with proper care and management. Remember, knowledge is a powerful tool in managing this rare disorder.

 

Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, 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. 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. Thank you for giving your valuable time to read the article.

 

Doctor visit helper

Prepare before seeing a doctor

A simple rural-patient checklist to help you explain symptoms clearly, ask better questions, and avoid unsafe self-treatment.

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
  • Bring old prescriptions, investigation reports, and current medicines.
  • Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
  • Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

  • What is the most likely cause of my symptoms?
  • Which danger signs mean I should go to hospital quickly?
  • Which tests are necessary now, and which can wait?
  • How should I take medicines safely and what side effects should I watch for?
  • When should I come for follow-up?

Tests to discuss

  • Vital signs: temperature, pulse, blood pressure, oxygen saturation
  • Basic physical examination by a clinician
  • CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

  • Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
  • Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
  • Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Avoid heavy lifting, sudden bending, and prolonged bed rest.
  • Use comfortable posture and gentle movement as tolerated.
  • Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

  • For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
  • Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Emergency care / cardiology / medicine doctor
Tests to discuss with doctor
  • ECG as early as possible when chest pain suggests heart risk
  • Troponin or cardiac blood tests if doctor suspects heart attack
  • Blood pressure, oxygen level, chest examination, and other tests as advised urgently
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?
  • Is this heart-related, and do I need emergency observation?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Paroxysmal Nocturnal Hemoglobinuria (PNH)

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

RX Patient Help

Ask a health question safely

Write your symptom story. A health professional or site editor can review it before any answer is prepared. This box is not for emergency care.

Emergency first: Severe chest pain, breathing trouble, unconsciousness, stroke signs, severe injury, heavy bleeding, or rapidly worsening symptoms need urgent local medical care now.

Frequently Asked Questions

Is this article a replacement for a doctor?

No. It is educational content only. Patients should consult a qualified clinician for diagnosis and treatment.

When should I seek urgent care?

Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

References

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