What is Hemophilia?
Hemophilia is a rare genetic bleeding disorder in which a person has certain genetic factors that prevent their blood from properly clotting. Blood-clotting factors are needed to help stop bleeding after a cut or injury and to prevent spontaneous bleeding.
The hemophilia gene can contain many different errors, leading to different degrees of abnormality in the ability of clotting. People who have hemophilia are at risk for abnormal bleeding throughout the body, especially in the joints and muscles, which may lead to debilitating problems.
Hemophilia occurs almost exclusively in men because it is a recessive gene.