It is common to see patients with very slow healing of anal area wounds, or the situation that they cannot heal despite all efforts, which is called slow healing. There are many reasons for slow wound healing after surgery, mainly the following 3 aspects: 1. disease factors: such as tuberculosis infection, diabetes mellitus, chronic ulcerative colitis, clonal disease patients often have slow healing surgical wounds. 2, physical factors: such as malnutrition, severe anemia, etc., resulting in slow wound healing. 3, improper treatment: such as improper incision design, incomplete treatment of anal fistula or abscess, poor drainage of the incision, foreign bodies on the wound, pseudo-healing, and improper dressing changes may lead to slow wound healing.