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Symptoms and Signs of DVT (Deep Vein Thrombosis, Blood Clot in the Leg) Warning Signs and Symptoms

Doctor's Notes on DVT (Deep Vein Thrombosis, Blood Clot in the Leg) Warning Signs, Symptoms, Causes, and Treatments

Deep vein thrombosis (DVT) is a condition in which blood clots (thrombi, singular = thrombus) for in the deep veins of the extremities, usually the legs. There are a number of potential causes of DVT. Causes include broken bones, other trauma to a limb, immobility (such as prolonged bedrest or long flights), medications, smoking, genetic predisposition, and certain cancers.

Deep vein thrombosis may not cause any associated symptoms or signs. Symptoms of a deep vein thrombosis in a leg are swelling of the involved leg, leg pain, tenderness, redness, and warmth. A DVT (thrombus) in the deep veins of the leg becomes dangerous if a piece of the blood clot breaks off and passes through the blood stream, through the heart, and into the pulmonary arteries. This is known as a pulmonary embolism.

Medical Author:
Medically Reviewed on 3/25/2019


Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.