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Hemophilia [hee-muh-FIL-ee-uh] is a rare genetic bleeding disorder that prevents blood from clotting. During the clotting process, blood platelets along with special proteins, called clotting factors, help form a clot. The clot stops bleeding and protects the body while it heals.
People with hemophilia have lower levels of certain clotting factors. With less clotting ability, people with hemophilia bleed more easily and bleed longer. Even minor injuries can cause extended bleeding inside and outside the body and lead to serious health problems. Over time, internal bleeding can result in swelling, pain, and even tissue damage.
Common symptoms of hemophilia include:
See a doctor if you or your child have any symptoms of hemophilia.
Seek emergency care for:
For most people, hemophilia is hereditary or passed from parent to child. In 1 out of every 3 cases, there is no family history of the disorder – it is caused by changes in the person’s own genes.
The gene that causes hemophilia is often linked to a person’s sex. Males with the altered gene will have symptoms while females may or may not have symptoms. The chances of inheriting the gene also depend on which parent has the gene and if the child is male or female.
There are 3 types of hemophilia:
Hemophilia can be mild, moderate, or severe. The severity depends on the levels of clotting factors in the blood.
Doctors will use blood tests to diagnose hemophilia. Screening tests will measure levels of different cells and proteins in the blood as well as check the blood’s ability to clot. Clotting factor tests will determine the type of hemophilia and its severity.
Blood tests are also used to rule out other conditions that might cause unusual bleeding.
There is no cure for hemophilia but it can be managed with specialized care.
The most common treatment for hemophilia is replacement therapy. Concentrated versions of clotting factors are infused (injected) into a person’s vein. These infusions help replace the low or missing clotting factors, which can help prevent and control bleeding.
Infusions can be given at home and usually last 15 to 20 minutes. People with severe hemophilia may need regular infusions of clotting factor to prevent serious bleeding or joint damage. Others may only need the infusions to treat bleeding when it happens, or prior to a procedure or activity that can cause bleeding.
There are potential risks and complications of replacement therapy: