Diabetic foot is one of the very common complications of diabetes. Because diabetic foot is the main cause of amputation and is very harmful, many diabetic patients are afraid of diabetic foot. Diabetic patients should understand the clinical symptoms of diabetic foot to prevent the occurrence of diabetic foot. The diabetic foot is a common condition in which the blood supply to the extremity is inadequate, the local skin is swollen, the foot appears, numbness, dullness or partial loss of sensation, accompanied by pain, as if it is obvious at night, and the arterial pulsation of the foot is weakened, which often does not attract the attention of patients at the beginning. 2, the initial stage of the diabetic foot: the initial diabetic foot symptoms are the sole or foot The diabetic foot symptoms are repeated infections of the foot, and the degree of infection has further deepened, and has damaged the subcutaneous tissue of the foot, and formed tissue inflammation. At this time, if not immediately controlled, the infection will spread along the muscle gap in the shape of an inverted triangle, purulent secretions gradually increase, and the secretions are smelly. 4, diabetic foot severe stage: severe stage diabetic foot symptoms show further aggravation of deep infection, inflammation of cellular tissue fused into a large pus cavity, muscle tendon ligament destruction is serious, purulent secretions and necrotic tissue increase, or deep tissue inflammation combined into a large pus cavity, surrounding Large areas of damaged tissue, destruction of bones and joints, and necrosis of toes and fingers. Diabetic foot mostly starts from neuropathy, and even without severe limb ischemia, it can lead to foot injury, infection, necrosis, and eventually some even require amputation.