Pain after anal fissure healing may be due to wound irritation or pain caused by pseudo-healing of the wound. When healing after anal fissure surgery, as the wound is not fully grown, the healing process may be stimulated by external pulling force or fecal matter extrusion, which may cause pain in the wound. It is also possible that the wound may not have been sterilized and changed properly, resulting in the appearance of healing of the wound epidermis, but the internal muscle tissues of the wound have not completely healed, resulting in pseudo-healing, which may also cause pain. After anal fissure surgery, we should pay attention to the care, regular disinfection and medication change, you can use 1:5000 potassium permanganate solution and other drugs anal local fumigation, sitz bath, promote local blood circulation and wound recovery. Diet to light and easy to digest, avoid spicy and stimulating food, at the same time to keep the bowel movement, develop good defecation habits, to prevent dry stools, constipation or diarrhea. If there is pain after healing of anal fissure, go to the hospital as early as possible for consultation and review, and give timely treatment so as not to affect the normal recovery after surgery.