The wound is difficult to heal or even recur; 4, the wound is sutured with gaps or dead cavities or excessive suture tension; 5, foreign bodies such as threads and cotton wool are left in the wound, surrounded by surrounding granulation tissue, which affects the normal growth of the wound; 6, the surgery does not correctly find the inner mouth or improperly and incorrectly handle the inner mouth, resulting in a false inner mouth, or even if the inner mouth is found, but the infected anal sinus, anal glands and primary lesions are not removed, resulting in The wound will not heal for a long time. Therefore, it is important to pay attention to the wound care after surgery and to change the medication in time to promote wound healing.