Diabetic foot is mainly secondary to the repeated persistence of diabetes mellitus and is prone to peripheral vascular disease leading to local arterial narrowing, which affects the distal blood supply and leads to limb infection or necrosis. The main prevention is to monitor changes in blood sugar, and attention should be paid to foot hygiene to avoid secondary infection after trauma. In case of diabetic foot, attention should be paid to daily disinfection to keep the wound clean, or local scrubbing with iodophor and foot bath with saline to relieve the patient’s pain and discomfort. In addition, if there is a serious infection, intravenous anti-infection treatment should be chosen. If an abscess is formed, surgical incision and drainage is required, and regular postoperative dressing changes are needed.