hemophilia

Overview
Hemophilia is a rare genetic disorder in which the blood does not clot properly due to a deficiency or absence of clotting factors. This means that even minor injuries can lead to prolonged bleeding, both externally and internally. Hemophilia primarily affects males, though females can be carriers, and it can range from mild to severe depending on the level of clotting factor deficiency.

Why It’s Important
Without proper management, hemophilia can lead to serious complications, such as joint damage from repeated internal bleeding, anemia, and life-threatening hemorrhages. Early diagnosis and treatment allow individuals to live more normal lives, prevent long-term damage, and reduce the risk of severe bleeding episodes.

Quick Facts

  • Primarily affects males, but females can be carriers

  • Types include Hemophilia A (factor VIII deficiency) and Hemophilia B (factor IX deficiency)

  • Estimated prevalence: about 1 in 5,000 male births for Hemophilia A

  • Considered a chronic condition, requiring lifelong management

What Happens in the Body
People with hemophilia lack sufficient clotting factors, which are proteins needed to stop bleeding. When an injury occurs, the blood cannot form a proper clot, leading to prolonged bleeding. Repeated internal bleeding, especially in joints and muscles, can cause pain, swelling, and long-term joint damage (hemarthrosis).

Common Signs and Symptoms

  • Excessive bleeding from cuts or injuries

  • Frequent nosebleeds or gum bleeding

  • Large or deep bruises easily

  • Joint pain and swelling from internal bleeding

  • Blood in urine or stool

  • Unexplained prolonged bleeding after surgery or dental procedures

Diagnosis

  • Blood tests to measure clotting factor levels

  • Family history review, especially in males with affected relatives

  • Genetic testing to confirm type and severity

  • Prenatal testing available for families with known hemophilia

Treatment and Management

  • Replacement therapy: Infusing missing clotting factors to prevent or control bleeding

  • Medications: Desmopressin (for mild Hemophilia A) to increase factor VIII

  • Physical therapy: To maintain joint health and prevent damage

  • Avoiding medications that affect clotting (like aspirin)

  • Hemophilia is not curable, but proper treatment allows for active, relatively normal lives

Risks and Complications

  • Internal bleeding, especially in joints, muscles, and brain

  • Chronic joint damage (arthropathy)

  • Anemia from repeated blood loss

  • Infections from contaminated blood products (rare with modern treatment)

Who Is at Risk

  • Males with a family history of hemophilia

  • Females can be carriers and may pass the gene to children

  • Rare spontaneous mutations can also cause hemophilia

Related Conditions

  • von Willebrand disease (another bleeding disorder)

  • Other clotting factor deficiencies

  • Hemarthrosis and joint disease from repeated bleeding

When to See a Doctor
Seek immediate medical care if there is:

  • Severe or uncontrolled bleeding

  • Bleeding into joints or muscles

  • Head injury with any sign of bleeding

  • Unexplained bruising or prolonged bleeding after minor cuts

Last Updated: October 2, 2025