Diabetic foot is a problem that results from deterioration of the blood supply to the foot, so that the skin, soft tissues, muscles and nerves become chronically hypoxic. The progressive disease process is evidenced by pain that worsens at night, a tingling and stabbing sensation in the foot. Quite characteristic is the appearance of the skin - it becomes thin, dry, scaly. Numerous cracks with foci of necrosis and ulceration appear.