Surgical incisions are healing. Depending on the site of the incision, the blood supply, the patient’s age, nutritional status, etc., the time required for healing varies, and the choice of scalpel also affects the healing time. Under normal circumstances, incisions on the head, neck and face can heal in 4-5 days, the lower abdomen and perineum in 6-7 days, the chest, upper abdomen, back and buttocks in 7-9 days, and incisions on the extremities take the longest time, 10-12 days. If the incision is made with an electric knife, the healing time will be extended by 1~2 days. In addition, some of their own diseases can also affect the healing of the wound, such as diabetic patients with poor glycemic control, often prone to wound infection resulting in delayed healing or non-healing. If the incision is contaminated, the wound healing will be delayed and even infected, and the healing time will be significantly prolonged, or even not healed. If the incision has become septic, it will need to be incised and drained again to control the infection before healing can take place. Regardless of the type of surgical incision, the incision should be properly protected, kept dry and clean, and the doctor should be informed of any special discomfort.