Hemophilia happens when the body does not make enough clotting factor. The severity or risk of bleeding depends on the level of clotting factor that is present.
There are two kinds of hemophilia:
Hemophilia is an inherited condition. The hemophilia gene is carried by women on one of their X chromosomes. It can be passed to their baby boys.
Severe cases happen when the factor level is less than 1 percent in children with hemophilia A or hemophilia B. These children:
Repeated joint bleeds can lead to other health problems and disabilities, such as:
Moderate hemophilia is when children have 1 percent to 5 percent of Factor 8 or Factor 9 in their body. These children:
Mild hemophilia occurs when children have more than 5 percent of Factor 8 or Factor 9 in their body. These children: