Blood Clot and Thrombosis
Blood clotting is a normal process that occurs in the body to prevent bleeding. The body makes blood clots and then breaks them down. Under certain circumstances, the body may be unable to break down a clot, which may result in a serious health condition.
Abnormal blood clotting in the veins is related to a combination of several problems such as "sluggish" blood flow through the veins, an abnormality in clot forming factors or an injury to the blood vessel wall.
Blood clots can form in arteries or veins. Clots formed in veins are called venous clots. Veins of the legs can be classified as superficial veins (close to the surface of the skin) or deep veins (located near the bone and surrounded by muscle). Pooling, or stasis, of blood in the legs and subsequent clotting can result in varicose veins. Clots in the legs may break loose and travel to the lungs, causing pulmonary clots (or pulmonary embolism) that can result in respiratory distress, pain, and in extreme cases, death.