The signs and symptoms of hemophilia A and hemophilia B are similar and can include the following:
Prolonged bleeding following an injury or surgery
Spontaneous bleeding (ie, bleeding that occurs without an apparent cause)
Bruising, which is very common in children with hemophilia
Pain and swelling resulting from bleeding into joints and muscles
Blood in the urine or stool
Heavy bleeding following circumcision
Unexplained nosebleeds
Bleeding into the brain, symptoms of which include long-lasting, painful headaches, repeated vomiting, sudden weakness or clumsiness of the arms or legs or problems walking, and convulsions or seizures