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Illustration of swelling of the leg, ankle and foot

Also called: Deep vein thrombosis, DVT, Phlebitis, Venous thrombosis

Thrombophlebitis is swelling of a vein caused by a blood clot. It usually occurs in your legs. If the affected vein is just beneath the skin, the condition is usually not dangerous. A clot in a deeper vein, called deep vein thrombosis, can break loose and cause a serious problem in the lung, called a pulmonary embolism, or a heart attack or stroke.

Sitting still for a long time can make you more likely to get thrombophlebitis. Some medicines and disorders that increase your risk for blood clots can also lead to thrombophlebitis. Common symptoms are

  • Warmth and tenderness over the vein
  • Pain or swelling in the part of the body affected
  • Skin redness

Treatment includes medicines to ease pain and inflammation, break up clots and keep new clots from forming. Keeping the affected area raised and applying moist heat can also help. If you are taking a long car or plane trip, take a break, walk or stretch your legs and drink plenty of liquids.

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