blood disorders
Excessive Clotting
Introduction
Excessive clotting (thrombophilia) occurs when the blood clots too easily or excessively. Inherited and acquired disorders can increase blood clotting. Clots in larger blood vessels cause legs or arms to swell. Blood levels of proteins that control clotting are measured. People may need to be treated with anticoagulants. (See also How Blood Clots .) Most disorders that cause thrombophilia increase the risk of blood clot formation in veins. A few increase the risk of clot formation in both arteries and veins. 