What is a bleeding disorder?
When a bleeding occurs due to a blood vessel injury, the body constricts the blood flow and sends platelet plugs to the hole in the blood vessel where they stick together and form a platelet plug. The body then sends a protein called clotting factor to the site of the injury and a blood clot is formed.
Having a bleeding disorder means your blood doesn’t clot as it should. A bleeding disorder can be caused by having no or decreased amount of the clotting factor, but can also be caused by a platelet defect (lack of platelets or platelets that doesn’t stick together).
In most cases, bleeding disorders are genetic, but they can also be acquired.
Source: Hemophilia Federation of America