Hemophilia is a group of inherited blood disorders in which the blood does not clot properly. It is the standard spelling but also known as haemophilia in the United Kingdom. Hemophilie, hemofilie, hemofili are other spellings but we have to use the standard spelling in this article.
Defects in the blood vessels, the coagulation mechanism or the blood platelets can cause disorders in bleeding. It is best explained that an affected person will bleed for a longer time or spontaneously than a healthy person after injury or any surgery.
The coagulation mechanism of the blood transforms the blood from a liquid into a hard solid then involves into several clotting. It generates fibrin when it is activated and together with the plug, it stops the bleeding. When these factors are deficient or actually missing, the blood does not clot properly, so the bleeding continues.