How should an anal fissure be treated? It can be addressed from several aspects. First, let's talk about general treatment. What is the principle of our treatment? It is to relieve pain after bowel movements and gradually promote the healing of the fissure. However, the first step is to relieve the spasm of the sphincter, then facilitate bowel movements to interrupt the vicious cycle. But what specific measures are there? One is to take a sitz bath with traditional Chinese medicine for pain relief, such as "Shen Soup," and a 1:5000 potassium permanganate solution after defecation, maintaining local cleanliness. Then, by orally taking some laxatives or paraffin oil, feces can be softened and lubricated. Alternatively, by increasing water intake and eating more fiber-rich foods, constipation can be corrected to keep the bowels clear. In more severe cases, such as those with sphincter spasms, we can perform anal dilation under local anesthesia. By dilating the anus, the spasm of the sphincter can be relieved, and the healing of the fissure can also be promoted. However, this method has a relatively high recurrence rate, and there may also be complications such as severe bleeding, perianal abscess, and fecal incontinence. Anal dilation should be treated by a doctor, and patients should not blindly use it themselves. Of course, there is also surgical treatment. Once an anal fissure has reached a certain degree, generally a chronic anal fissure, many patients need to undergo surgical treatment. Naturally, there are several surgical methods available. We choose different surgical methods according to the condition and severity of the anal fissure. For example, if the patient has an anal fissure that presents with sentinel piles and hypertrophic anal papillae, but there is no anal stricture or internal sphincter spasm, a simple excision of the fissure can be performed. This involves removing the pathological tissue of the fissure, excising the infective anal sinus along with the hypertrophic anal papillae and sentinel piles, allowing the fissure wound to drain openly. However, if there is associated anal stricture, or there is an internal sphincter spasm, we also need to perform an internal sphincterotomy.