Venous leg ulcers can be treated effectively with UNNA boots. What is a venous leg ulcer ? By definition, a leg wound of venous origin that has not taken longer than 6 months to heal is known as a venous ulcer. Whereas arterial ulcers occur in the toes or on the balls of the foot, the outer foot, inner foot, venous ulcers typically occur above the inner malleolus of the ankle (the inside of the leg above the ankle) or the outer ankle. Venous ulcers typically have discoloration or hyperpigmentati