Deep Vein Thrombosis Overview

Deep vein thrombosis is a condition where a blood clot (thrombus) forms in a deep vein. While this can occur in any vein, it is most typical in the legs, usually in the calf and thigh.

In the U.S. the occurrence of deep vein thrombosis of legs or lungs is 350,000-600,000 people affected.

Deep vein thrombosis differs from blood clots in superficial veins, which can lead to inflammation and discomfort in that it progresses to serious problems. Read more in this deep vein thrombosis patient education guide.


Symptoms include:

  • An area radiating heat
  • A tender area
  • Redness or red streak
  • Ache or pain on ambulation


Causes of deep vein thrombosis:

  • Inactivity e.g. bedridden, long car or plane trips
  • Change to veins post surgery
  • Injury to blood vessels
  • Familial tendency


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