The process of anal fissure surgery involves giving anesthesia and the patient is mostly painless, so it is painless. After the operation, as the effect of anesthesia medicine declines, patients will experience pain. 1. Intraoperative: According to the patient’s condition, anesthesia is needed for anal fissure surgery, and there are common local infiltration anesthesia, epidural anesthesia, intravenous anesthesia, etc. All in all, under the effect of anesthesia, the patient has no pain and it is painless. 2. Postoperative: the way of anal fissure surgery varies from person to person, for example, anal fissure resection, postoperative trauma is relatively large, it will be more painful; while the internal sphincter blocking surgery, the damage is smaller, and the pain is relatively small; fissure is larger, often need to be given to flap grafting, postoperative recovery is slow, and the pain is also larger. In short, it is more painful after anal fissure surgery. Because of postoperative pain and other manifestations, the physician will often give relevant painkillers and physical therapy according to the condition, such as taking painkillers such as ibuprofen, physical therapy such as warm water sitz baths, and can also apply intravenous pain pumps and other methods of pain relief. According to the specific needs of the condition, pain relief methods, it is recommended to use under the guidance of a professional physician.