What is thrombophlebitis?

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Thrombophlebitis is a vascular conditions in which the veins become inflamed and blood clots form inside. This conditions almost always develops in the veins in the legs, but occasionally occur in the arms or, more rarely, other parts of the body. Thrombophlebitis occurs in the veins close to the skin, the superficial veins. Thrombophlebitis is generally caused by irritation to the lining of the vein from, for example, prolonged intravenous injection of medications or infection. There is a very small risk of the blood clot traveling from the superficial veins into the deeper veins, and serious complications due to thrombophlebitis are extremely rare.