Thrombophlebitis is a condition characterized by inflammation of a vein, often accompanied by the formation of a blood clot. This typically occurs in the legs but can happen in other areas as well. Symptoms may include redness, swelling, warmth, and pain along the affected vein. The condition can be caused by factors such as prolonged immobility, injury, or certain medical conditions. While thrombophlebitis can be uncomfortable, it is usually treatable with medications, compression stockings, and lifestyle changes to improve circulation and reduce the risk of complications.