Anal fissure is a fissure of the skin of the anal canal caused by various reasons. Chronic anal fissure has an ulcer at the fissure. Whether the ulcer will disappear or not is mainly related to the degree of healing, the ulcer may still exist when the anal fissure is improved but not healed, and the ulcer will disappear if it is fully recovered. 1. Not disappeared: after active conservative treatment, the condition of anal fissure patients has improved, but in the case of incomplete healing, the ulcer surface may still exist, but it has been reduced, and further treatment is needed. 2. Disappearance: when the anal fissure improves to complete healing, the ulcer in the anal canal can disappear completely, and the patient has no pain and bleeding in the anus during bowel movement. If the anal fissure is improved after surgical treatment, only the surgical wound exists, and the ulcer has been removed and disappeared. The specific situation suggests that patients go to the hospital, improve the examination, clear the condition, the professional physician for the condition of the treatment, follow the doctor’s instructions.