What is factor 12 deficiency?
A person with factor 12 deficiency has a rare, hereditary condition that results in low levels of a protein involved in blood clotting. However, the person's blood clots normally. Normal blood coagulation requires the complex interaction of about 20 proteins, called clotting factors.

What are the symptoms of factor 12 deficiency?
There are usually no symptoms of factor 12 deficiency.

How does the doctor treat factor 12 deficiency?
Patients with factor 12 deficiency should avoid aspirin, nonsteroidal anti-inflammatory medications, and other medications that can promote bleeding.