What is haemophilia?
Haemophilia is a bleeding problem. People with haemophilia do not bleed any faster than normal, but they can bleed for a longer time. Their blood does not have enough clotting factor. Clotting factor is a protein in blood that controls bleeding.
haemophilia is quite rare. About 1 in 10,000 people are born with it.
Types of haemophilia
The most common type of haemophilia is called haemophilia A. This means the person does not have enough clotting factor VIII (factor eight).
Haemophilia B is less common. A person with haemophilia B does not have enough factor IX (factor nine). The result is the same for people with haemophilia A and B; that is, they bleed for a longer time than normal.