What causes deep vein clots to form?
Blood clots can form in your body’s deep veins when damage occurs to a vein’s inner lining, if blood flow is sluggish or your blood is thicker or more likely to clot than usual. Blood clots can occur when you are inactive. For example, clots can form if you are paralyzed or bedridden or must sit while on a long flight or car trip. Surgery or an injury can damage your blood vessels and cause a clot to form. Cancer can also cause deep vein thrombosis. Some people have blood that clots too easily, a problem that may run in families.
