The dictionary definition of hemophilia is- a medical condition in which the ability of the blood to clot is severely reduced, causing the sufferer to bleed severely from even a slight injury. The condition is typically caused by a hereditary lack of a coagulation factor, most often factor VIII.
Hemophilia is detected by a verity of blood test to test for the cloting. One sign that they can see externally easily is brushing and external and internal bleeding, thoughts things are a major sign of hemophilia.
Sadly the symptoms of this disease are pain in joints, external and internal bleeding (exceivly), and extrem brusing.