Good diabetologist in yelahanka What are the first signs of diabetes in the feet? Signs of Diabetic Foot Problems Changes in skin color. Changes in skin temperature. Swelling in the foot or ankle. Pain in the legs. Open sores on the feet that are slow to heal or are draining. Ingrown toenails or toenails infected with fungus. Corns or calluses. Dry cracks in the skin, especially around the heel.