Diabetic foot is one of the most common complications of diabetes mellitus, which refers to lower limb infection, ulceration or even gangrene occurring in diabetic patients on the basis of combined peripheral neuropathy and peripheral vascular disease, requiring amputation in severe cases, and is the main cause of disability in diabetic patients. The initial symptoms of diabetic foot are manifested in the following aspects: 1. The manifestations of diabetic foot neuropathy mainly include dullness or loss of sensation, numbness, muscle atrophy, weakened or absent knee tendon reflexes, the appearance of Charcot joint, foot deformities such as bowed feet, hammer toes, chicken claw toes, etc. Nociceptive sensitivity, pins-and-needles, knife-like or burning pain in the extremities. Arterial pulsation is present. 2, diabetic foot vasculopathy manifestations mainly arterial occlusion ischemia, foot cold, cold, numbness, itchy skin, intermittent claudication. With the aggravation of the disease, resting pain will also appear, which is aggravated in the cold season or at night, and patients often sit on their knees and have difficulty sleeping at night, accompanied by dry skin, sparse sweat, deformed, thick, brittle toenails, and loss of luster; the dorsal foot artery and posterior tibial artery pulsation is weakened or disappeared. 3. Infection, ulceration and gangrene occur. Localized skin congestion, swelling, blisters/blood blisters, ulcers, or pus cavities, sinus tracts, and wet or dry gangrene are seen. It is common in the feet and legs, and in severe cases, large, deep ulcers and gangrene may develop, raising the risk of amputation and the possibility of multiple complications. When these abnormal manifestations are detected, early further examination and treatment at a trauma repair specialist, together with control of the primary disease hyperglycemia, can effectively curb the further deterioration of diabetic foot development. The root cause of the deterioration of diabetic foot lies in the persistence of high blood sugar that does not drop. Whether oral hypoglycemic drugs or insulin injection, we should try to control blood sugar, in addition to strict control of sugar intake in diet, and also appropriate exercise to promote the body’s ability to metabolize sugar.