The treatment of leg ulcers includes treating the cause of the ulcer, all other factors contributing to healing problems and treating issues concerning the ulcer itself. To say that a patient has a leg ulcer does not mean that the patient has a diagnosis. The definition of a leg ulcer is an ulcer on the leg or foot below the knee that has not healed in 6 weeks (some use 4 weeks), while a venous ulcer has venous insufficiency as its most important cause.