Patrick suffers from a genetic abnormality in which delayed blood clotting causes internal and external bleeding.

The answer is Hemophilia.

Explanation:

Hemophilia is a hereditary disease that is characterized by a defect in blood clotting due to the lack of one of the factors involved in it and manifested by a persistence of bleeding. When the blood does not coagulate properly, excessive bleeding (internal and external) occurs after an injury. Symptoms include several large or deep bruises, inflammation and joint pain, unexplained bleeding and blood in the urine or feces.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.