Pseudo healing, anal incontinence, postoperative recurrence and other sequelae may occur after complex anal fistula resection. 1. False healing: If the wound is not taken care of in time after complex anal fistula surgery, it may lead to the deep tissues not healing, causing the skin outside the anus to have been closed, and false healing occurs. 2. Anal incontinence: If the operation of complex anal fistula excision is not standardized, such as removing too much anal muscle tissue, it may be easy to damage the anorectal ring, and the phenomenon of anal incontinence occurs. 3. Postoperative recurrence: complex anal fistula has multiple internal or multiple fistulas, if the operation is not accurate to find the internal orifice, the fistula treatment is not complete, may cause postoperative recurrence. After complex anal fistula excision, should be appropriate bed rest, reduce the stimulation of the wound, reduce pain, avoid bleeding and defecation, follow the doctor’s instructions Execution.