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Living with Acquired hemophilia

A bleeding disorder in which the immune system attacks a blood clotting protein, causing bruising and bleeding.

Understanding Acquired hemophilia

Acquired hemophilia is a bleeding disorder that interferes with the body's blood clotting process.

Signs include prolonged bleeding, frequent nosebleeds, bruising throughout the body, hematomas (solid swellings of clotted blood), blood in the urine, and digestive or urinary tract bleeding. It happens when the immune system attacks and disables a protein that helps blood clot. About half of cases are linked to other conditions such as pregnancy, autoimmune disease, cancer, skin diseases, or reactions to medicines.

Signs & symptoms

GARD doesn't list a symptom list for this condition yet. The summary describes these features:

  • Prolonged bleeding
  • Frequent nosebleeds
  • Bruising throughout the body
  • Hematomas (solid swellings of blood)
  • Blood in the urine
  • Digestive or urinary tract bleeding

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Global Autoimmune Institute may keep lists of experts for this condition.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Expert lists: Global Autoimmune Institute
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Global Autoimmune Institute and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What may have triggered my immune system to do this?
What should I do if I have bleeding or a large bruise?
Which specialist, such as a hematologist, should follow me?

Quick facts

The body's immune system attacks and disables a protein that helps blood clot. About half of cases are linked to pregnancy, autoimmune disease, cancer, skin diseases, or allergic reactions to medicines.

Also known as: hemophilia, acquired

Patient organizations

Source: NIH GARD · Acquired hemophiliaGARD ID 10350 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Acquired hemophilia.

Explore the Acquired hemophilia blog

Explore research for Acquired hemophilia

Explore actively recruiting Acquired hemophilia studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Acquired hemophilia with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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