A wound in the anus may be seen as a localized soft tissue laceration of the skin following trauma. In addition, the patient has a history of habitual constipation, which leads to the formation of a fissure at the anal opening during each bowel movement, and the patient may also experience significant pain and blood in the bowel movement. It is especially common in young patients or children, and is caused by an unreasonable diet, especially if they like to eat puffed food and spicy food, which can easily induce constipation, which is the root cause of anal fissure formation. For mild anal fissures, conservative treatments such as saline baths, topical hemorrhoid creams and constipation can be used to improve the condition. Severe anal fissures require surgery to remove the ulcerated surface of the fissure and intravenous anti-infection treatment after surgery.