Blood clot in a vein

A blood clot (a clump of blood) that forms in a vein and causes inflammation is called thrombophlebitis. Symptoms include pain, tenderness, warmth, and redness along the length of a vein.

A clot may form either in a vein just under the surface of the skin (superficial thrombophlebitis) or in a deep vein (deep vein thrombosis, or DVT).

Thrombophlebitis can occur in any vein, but it is most common in the leg veins. Clots in a deep leg vein (deep vein thrombosis) are serious because a clot can break loose and travel through the bloodstream to the lung (pulmonary embolism).

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.