A leg ulcer is a long-lasting (chronic) sore that takes more than 4 to 6 weeks to heal. They usually develop on the inside of the leg, just above the ankle. The symptoms of a venous leg ulcer include pain, itching and swelling in the affected leg. There may also be discoloured or hardened skin around the ulcer, and the sore may produce a foul-smelling discharge. See your GP if you think you have a leg ulcer, as it will need specialist treatment to help it heal. Your GP will examine your leg and may carry out additional tests to rule out other conditions.