What is the medical term meaning inflamed veins causing the formation of blood clots within the vein?

The medical term for inflamed veins that lead to the formation of blood clots within the vein is "thrombophlebitis." This condition occurs when a vein becomes inflamed, often due to a blood clot, which can cause pain, swelling, and redness in the affected area. Thrombophlebitis can occur in superficial veins as well as deep veins, leading to more serious complications if not treated.