First Time User? Enroll now.
*Vaccine availability and appointments* | Visitor and mask policies | Additional COVID-19 resources.
Home > Health Library > 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 vein deep in the leg (deep vein thrombosis, or DVT). Clots in a vein just under the skin rarely cause serious problems because they do not travel through the bloodstream. Once this kind of blood clot has been diagnosed by a health professional, the person can often care for the symptoms safely at home.
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). Symptoms of deep vein thrombosis include swelling, pain, and possibly redness in one leg or a noticeable new difference in the size of one leg. Another symptom of deep vein thrombosis is pain when walking or when the foot is flexed upward.
Current as of: December 16, 2019
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & E. Gregory Thompson MD - Internal Medicine & Martin J. Gabica MD - Family Medicine & Jeffrey S. Ginsberg MD - Hematology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2020 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.