The reasons for the difficulty of wound healing are mainly related to the patient’s combined obesity, diabetes, poor nutrition, heavy infection, poor local blood flow, long-term bed rest and lack of activity, as well as intraoperative application of high-frequency electric knife causing fat cell degeneration and necrosis. Generally, the wound can be healed after active dressing change and treatment of the primary disease. However, the healing time varies depending on the size of the wound and the exudate situation. Different treatment plans need to be developed depending on the wound healing situation and the amount of exudate. The wound can be healed by removing some or all of the sutures, leaving drainage strips in place to clear the drainage, applying anti-inflammatory drugs to prevent infection if necessary, and promoting the growth of granulation tissue.