Haemophilia

Also called Haemophilia A or Haemophilia B

Haemophilia is a rare condition, usually inherited, where the blood does not clot normally because a clotting factor is missing or low. People with it bleed for longer after injuries or surgery, and in severe cases can bleed into joints and muscles without a clear reason. It mostly affects males.

Last updated Nov 9, 2026

What it is

Treatment replaces the missing clotting factor, either regularly to prevent bleeds or when a bleed happens. Newer medicines can also help.

Care is usually managed by a specialist haemophilia centre.

Common signs

  • Bleeding that takes a long time to stop
  • Large or deep bruises
  • Bleeding into joints, causing pain and swelling
  • Nosebleeds that are hard to stop
  • Bleeding after dental work

How it is usually diagnosed

  • Blood clotting tests
  • Clotting factor levels
  • Genetic testing

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Clotting factor levels and severity
  • A treatment plan and bleed diary
  • Haemophilia centre letters
  • Emergency card details

Questions to ask your doctor

  • How severe is my haemophilia?
  • What should I do when a bleed starts?
  • What do I need to tell a dentist or surgeon?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • A head injury, bleeding that will not stop, or a severe headache: call 112 and say you have haemophilia

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources