Wound healing requires good blood circulation and innervation, while diabetic patients have poor peripheral vascular embolism and nerve nutrition due to lesions, so once the wound is broken, the wound is extremely difficult to heal, and most patients, due to poor sensation, often have wounds that are not detected at an early stage, and once detected, there are more serious conditions, such as local necrosis and infection. The foot is the most distal part of the body, poor blood flow, so once the foot is broken wound is difficult to heal. Therefore, prevention is extremely important, once the wound can be washed with external saline, topical application of Bactrim ointment (available in pharmacies or hospitals), blood sugar control, and even systemic anti-infection treatment, in addition, if there is local redness, swelling, touch the sense of volatility to consider the local abscess, the need to go to the hospital for drainage, otherwise it is easy to cause the spread of infection, serious amputation or even life-threatening; blood sugar and infection are mutually affected. If the blood sugar is not well controlled, the infection is difficult to control and vice versa; try not to use iodine and alcohol for wound disinfection, but use iodophor disinfectant topically. Wound healing time is different for each person and is related to the treatment method. It takes half a year or even a year for a long dressing change, but surgical treatment can shorten the course of the disease.