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Deep Vein Thrombosis Health Center

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Blood Clots in the Leg Veins - Topic Overview

Blood clots can happen in veins. A blood clot in a vein close to the skin isn't likely to cause problems. But having blood clots in deep veins is called deep vein thrombosis. Deep vein thrombosis happens most often in the legs. This problem can lead to a blood clot in the lung (pulmonary embolism).

The deep veins of the leg have different terms to describe their location:

Recommended Related to DVT (Deep Vein Thrombosis)

How to Prevent Deep Vein Thrombosis (DVT)

DVT is a blood clot that forms deep in your veins, most often in your leg. It can partially or completely block blood flow back to the heart and damage the one-way valves in your veins. It can also break free and travel to major organs, such as your lungs, which can be very dangerous. About 1 in 10 people die from DVT complications. About 350,000 Americans are diagnosed with these blood clots each year, and almost as many have them and don't know it. Even if you're at risk, you can take steps...

Read the How to Prevent Deep Vein Thrombosis (DVT) article > >

  • Upper (proximal) leg veins are those above the knee but below the waist.
    • Popliteal veins are located behind the knee.
    • Iliac and femoral veins are in the groin area.
  • Lower (distal) leg veins are those below the knee.
    • Distal leg veins are located in the calf and ankle.

A person with a blood clot in a deep upper (proximal) leg vein is at increased risk for a blood clot in the lung or other complications.

    WebMD Medical Reference from Healthwise

    Last Updated: March 12, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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