Stasis ulcers are open wounds on the medial or lateral portion of the calf or foot that are at risk of infection. They may take a long time to heal and they may need the assistance of a podiatrist or wound clinic to help them heal. An ulcer is caused by the stasis or pooling of blood in the ankles or feet. This pooling blood causes a breakdown of the skin. Over time the skin becomes very fragile and a small scrape can cause an ulcer to develop. Treating varicose veins can aid in the healing process of active ulcerations.