IgA Pemphigus

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 7 min read
Patient Tools

Read, save, and share this guide

Use these quick tools to make this medical article easier to read, print, save, or share with a family member.

On this page4 sections

Article Summary

IgA pemphigus is a rare autoimmune disease that causes blistering of the skin and mucous membranes. It is characterized by the presence of IgA antibodies that attack desmoglein proteins in the skin, leading to the separation of skin cells and blister formation. It is characterized by the presence of IgA antibodies that target desmoglein 1 and 3, leading to the formation of blisters and erosions....

Key Takeaways

  • This article explains Causes in simple medical language.
  • This article explains Symptoms in simple medical language.
  • This article explains Diagnosis in simple medical language.
  • This article explains Treatment in simple medical language.
Before reading

RX Patient Tools

Use these quick guides before reading the article, or return to them when you need help preparing questions for a doctor.

Start here Choose the right pathway for symptoms, reports, medicines, or urgent warning signs. Disease article roadmap Read this topic step by step: meaning, symptoms, warning signs, diagnosis, treatment, prevention, and follow-up. Treatment planner Prepare questions about treatment choices, benefits, risks, side effects, and follow-up. Family & caregiver guide Organize symptoms, reports, medicines, questions, and follow-up safely. Nutrition & diet guide Prepare food, hydration, supplement, and medicine-timing questions safely. Prevention guide Organize risk factors, protective habits, screening, and warning signs. Recovery guide Prepare a safe plan for activity, rehabilitation, warning signs, and follow-up.
Educational health guideWritten for patient understanding and clinical awareness.
Reviewed content workflowUse writer and reviewer profiles for stronger trust.
Emergency safety firstUrgent warning signs are highlighted below.
Definition

IgA pemphigus is a rare that causes blistering of the skin and mucous membranes. It is characterized by the presence of IgA antibodies that attack desmoglein proteins in the skin, leading to the separation of skin cells and formation. It is characterized by the presence of IgA antibodies that target desmoglein 1 and 3, leading to the formation of blisters and erosions. Treatment typically involves corticosteroids and immunosuppressants, although some cases may resolve on their own.

Causes

IgA pemphigus is a rare disorder characterized by the presence of IgA autoantibodies that target the desmoglein 1 and/or 3 proteins, leading to the formation of blisters and lesions on the skin and mucous membranes. The exact cause of IgA pemphigus is not fully understood, but there are several factors that are believed to contribute to its development. Some of the main causes of IgA pemphigus are:

  1. predisposition: There is evidence to suggest that certain genetic factors may play a role in the development of IgA pemphigus. Some studies have identified specific gene mutations that are associated with the disorder, and it is believed that individuals who inherit these genetic variants may be more susceptible to developing IgA pemphigus.
  2. Environmental triggers: In some cases, IgA pemphigus may be triggered by exposure to certain environmental factors, such as chemicals, drugs, or infections. For example, some studies have suggested that exposure to certain medications, such as penicillin and cephalosporins, may trigger an immune response that leads to the formation of IgA autoantibodies.
  3. Immune system dysfunction: IgA pemphigus is an autoimmune disorder, which means that it occurs when the immune system mistakenly attacks healthy cells and tissues in the body. It is believed that certain immune system dysfunctions may contribute to the development of IgA pemphigus, such as abnormal immune cell activity or an imbalance in immune system signaling molecules.
  4. Other underlying health conditions: In some cases, IgA pemphigus may be associated with other underlying health conditions, such as , , or other autoimmune disorders. These conditions may increase the risk of developing IgA pemphigus or may trigger the of symptoms.

Overall, the exact cause of IgA pemphigus is not fully understood, and further research is needed to better understand the underlying mechanisms that contribute to its development. However, identifying the main causes of the disorder is an important step in developing effective treatments and prevention strategies.

Symptoms

IgA pemphigus is a rare autoimmune disease that affects the skin and mucous membranes. The main symptoms of IgA pemphigus are:

  1. Skin lesions: IgA pemphigus can cause blistering, crusting, and scaling of the skin. These lesions may be itchy and painful, and can occur anywhere on the body.
  2. Oral lesions: IgA pemphigus can also cause blisters and ulcerations in the mouth and , making it difficult to eat and speak.
  3. Conjunctivitis: In some cases, IgA pemphigus can cause of the eyes, leading to conjunctivitis and vision problems.
  4. Hair loss: In cases, IgA pemphigus can cause hair loss and scarring of the scalp.
  5. symptoms: IgA pemphigus can also cause , , and muscle aches, which can make it difficult to carry out everyday activities.

If you experience any of these symptoms, it is important to see a dermatologist or other healthcare provider for and treatment.

Diagnosis

The main diagnosis of IgA pemphigus is based on a combination of features, , and immunofluorescence studies.

Clinical features: IgA pemphigus usually presents with multiple painful blisters and erosions on the skin, scalp, and mucous membranes. The lesions may be pruritic, flaccid, and hemorrhagic, and can occur in clusters or as isolated lesions. The most common sites of involvement are the face, neck, scalp, , , and oral mucosa.

Histopathology: Skin is the most important diagnostic tool for IgA pemphigus. The biopsy shows subepidermal blisters with neutrophilic infiltration in the upper . The histopathological features are similar to other subepidermal autoimmune bullous diseases.

Immunofluorescence studies: Direct immunofluorescence (DIF) and indirect immunofluorescence (IIF) are the two types of immunofluorescence studies used for the diagnosis of IgA pemphigus. DIF shows linear IgA deposition along the basement membrane zone of the skin, whereas IIF shows circulating IgA antibodies that react with the patient’s skin. ELISA is also used for the detection of circulating IgA antibodies.

Other diagnostic tests: In some cases, immunoblotting and immunoelectron microscopy may be required for the diagnosis of IgA pemphigus.

In summary, the diagnosis of IgA pemphigus is based on a combination of clinical, histopathological, and immunofluorescence features. Early diagnosis and prompt treatment are essential to prevent complications and improve the patient’s quality of life.

Treatment

Treatment of IgA pemphigus is challenging, and there is no standardized regimen.

The mainstay of treatment for IgA pemphigus is the use of immunosuppressive agents to suppress the immune system and decrease the production of autoantibodies. The following medications have been used in the treatment of IgA pemphigus:

  1. Systemic corticosteroids: Prednisone or other corticosteroids are often used as the first-line treatment for IgA pemphigus. These drugs can suppress the immune system and decrease inflammation, thereby reducing blister formation.
  2. Immunosuppressive drugs: Azathioprine, mycophenolate mofetil, and methotrexate are examples of immunosuppressive drugs that can be used to treat IgA pemphigus. These drugs work by inhibiting the production of new cells in the immune system, which can reduce the production of autoantibodies.
  3. Rituximab: This is a monoclonal antibody that targets B cells in the immune system, which are responsible for producing the autoantibodies in IgA pemphigus. Rituximab has been shown to be effective in treating IgA pemphigus, especially in patients who have not responded to other treatments.
  4. Intravenous immunoglobulin (IVIG): IVIG is a treatment that involves infusing antibodies derived from human blood into the patient’s bloodstream. IVIG has been shown to be effective in treating some autoimmune diseases, including IgA pemphigus.
  5. Plasmapheresis: This is a procedure in which the patient’s blood is filtered to remove autoantibodies and other immune system components that are contributing to the disease. Plasmapheresis has been used in the treatment of IgA pemphigus, especially in patients with severe disease who have not responded to other treatments.

In conclusion, the treatment of IgA pemphigus is challenging, and there is no standardized therapeutic regimen. The mainstay of treatment is the use of immunosuppressive agents, such as corticosteroids, immunosuppressive drugs, rituximab, IVIG, and plasmapheresis. The choice of treatment depends on the severity of the disease, the patient’s response to treatment, and the presence of any underlying conditions.

  1. https://www.ncbi.nlm.nih.gov/books/NBK11733/
  2. https://www.ncbi.nlm.nih.gov/books/NBK208/
  3. https://www.ncbi.nlm.nih.gov/books/NBK212/
  4. https://www.ncbi.nlm.nih.gov/books/NBK92761/
  5. https://www.ncbi.nlm.nih.gov/books/NBK11733/
  6. https://www.nccih.nih.gov/health/skin-conditions-at-a-glance
  7. https://www.aad.org/public/diseases/a-z
  8. https://medlineplus.gov/skinconditions.html
  9. https://www.aad.org/about/burden-of-skin-disease
  10. https://www.usa.gov/federal-agencies/national-institute-of-arthritis-musculoskeletal-and-skin-diseases
  11. https://www.cdc.gov/niosh/topics/skin/default.html
  12. https://www.skincancer.org/
  13. https://www.jaad.org/
  14. https://www.psoriasis.org/about-psoriasis/
  15. https://books.google.com/books?
  16. https://www.niams.nih.gov/health-topics/skin-diseases
  17. https://cms.centerwatch.com/directories/1067-fda-approved-drugs/topic/292-skin-infections-disorders
  18. https://www.fda.gov/files/drugs/published/Acute-Bacterial-Skin-and-Skin-Structure-Infections—Developing-Drugs-for-Treatment.pdf
  19. https://dermnetnz.org/topics
  20. https://www.aaaai.org/conditions-treatments/allergies/skin-allergy
  21. https://www.sciencedirect.com/topics/medicine-and-dentistry/occupational-skin-disease
  22. https://aafa.org/allergies/allergy-symptoms/skin-allergies/
  23. https://www.nibib.nih.gov/
  24. https://rxharun.com/resources/category/resources/rxharun/article-types/skin-care-beauty/skin-diseases-types-symptoms-treatment/
  25. https://www.nei.nih.gov/
  26. https://en.wikipedia.org/wiki/List_of_skin_conditions
  27. https://en.wikipedia.org/?title=List_of_skin_diseases&redirect=no
  28. https://en.wikipedia.org/wiki/Skin_condition
  29. https://oxfordtreatment.com/
  30. https://www.nidcd.nih.gov/health/
  31. https://consumer.ftc.gov/articles/w
  32. https://www.nccih.nih.gov/health
  33. https://catalog.ninds.nih.gov/
  34. https://www.aarda.org/diseaselist/
  35. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets
  36. https://www.nibib.nih.gov/
  37. https://www.nia.nih.gov/health/topics
  38. https://www.nichd.nih.gov/
  39. https://www.nimh.nih.gov/health/topics
  40. https://www.nichd.nih.gov/
  41. https://www.niehs.nih.gov
  42. https://www.nimhd.nih.gov/
  43. https://www.nhlbi.nih.gov/health-topics
  44. https://obssr.od.nih.gov/
  45. https://www.nichd.nih.gov/health/topics
  46. https://rarediseases.info.nih.gov/diseases
  47. https://beta.rarediseases.info.nih.gov/diseases
  48. https://orwh.od.nih.gov/

More from this topic
  1. Enlarged Nasopharyngeal Tonsil

    DefinitionEnlarged nasopharyngeal tonsil means the adenoid has become bigger than normal. The adenoid is a patch of lymph tissue high at the back of the nose,...

    April 4, 2026 • Rx ENT, Oral and Dental Health (A - Z)
  2. Enlarged Adenoids

    DefinitionEnlarged adenoids mean the adenoid tissue at the back of the nose has become bigger than normal. The adenoids are part of the body’s immune system....

    April 4, 2026 • Rx ENT, Oral and Dental Health (A - Z)
  3. Adenoid Hypertrophy

    DefinitionAdenoid hypertrophy means the adenoids are bigger than normal. The adenoids are soft lymph tissue at the back of the nose, high in the throat, and...

    April 4, 2026 • Rx ENT, Oral and Dental Health (A - Z)
  4. Congenital Epstein–Barr Virus Infection

    DefinitionCongenital Epstein–Barr virus infection means a baby is thought to get Epstein–Barr virus, or EBV, before birth while still inside the mother’s womb. EBV is also...

    April 4, 2026 • Rx Blood, Metabolism, and Infectious Diseases (A - Z)
  5. Mother-to-Child Transmission of Enterovirus Infection

    DefinitionMother-to-child transmission of enterovirus infection means an enterovirus infection passes from a pregnant mother to her baby before birth, during labor, at the time of delivery,...

    April 4, 2026 • Rx Blood, Metabolism, and Infectious Diseases (A - Z)
  6. Congenital Enterovirus Infectious Disease

    DefinitionCongenital enterovirus infectious disease means an enterovirus infection that is already present in the baby before birth or becomes apparent at birth or in the first...

    April 4, 2026 • Rx Blood, Metabolism, and Infectious Diseases (A - Z)
  7. Congenital Enterovirus Infection

    DefinitionCongenital enterovirus infection means a baby is infected with an enterovirus before birth or around the time of birth from the mother. In very simple words,...

    April 3, 2026 • Rx Blood, Metabolism, and Infectious Diseases (A - Z)
  8. Congenital Enterocyte Heparan Sulfate Deficiency

    DefinitionCongenital enterocyte heparan sulfate deficiency is a very rare, severe, genetic intestinal disease. In this condition, the small bowel lining cells, called enterocytes, do not show...

    April 3, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  9. Congenital Enterocyte Heparan Sulfate Deficiency

    DefinitionCongenital enterocyte heparan sulfate deficiency is a real but ultra-rare genetic intestinal disease. It causes the small-intestine lining cells, called enterocytes, to lack heparan sulfate on...

    April 3, 2026 • Rx Blood, Metabolism, and Infectious Diseases (A - Z)
  10. Undescended Shoulder Disease

    DefinitionUndescended shoulder disease is not the usual medical name. Doctors usually call this condition Sprengel deformity, Sprengel shoulder, congenital high scapula, or congenital elevation of the...

    April 3, 2026 • Degenerative Bones, Joints, and Spine Care (A - Z)
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

  • Drink safe fluids and monitor temperature.
  • In dengue-prone areas, discuss CBC and platelet count when fever persists or warning signs appear.
  • Use tepid sponging for high fever discomfort; avoid ice-cold bathing.

OTC medicine safety

  • For fever, common fever medicine may be discussed with a clinician or pharmacist.
  • Avoid aspirin/ibuprofen-like medicines in suspected dengue unless a doctor says it is safe.

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

  • Fever with breathing difficulty, confusion, repeated vomiting, bleeding, severe weakness, stiff neck, or dehydration 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: Medicine doctor / pediatrician for children / qualified clinician
Tests to discuss with doctor
  • Temperature chart and hydration assessment
  • CBC with platelet count if fever persists or dengue/other infection is possible
  • Urine test, malaria/dengue tests, chest evaluation, or blood culture only when clinically indicated
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?
  • Do I need antibiotics, or is this more likely viral?

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: IgA Pemphigus

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.