Anal fissure is a relatively common clinical condition that is formed mainly because of dry stool which leads to perianal skin fissures. The first thing is not to be nervous, you can observe its severity, if the symptoms are relatively light, you can give conservative treatment. First, pay attention to diet, avoid spicy and stimulating food, avoid drinking a lot of alcohol, eat more coarse fiber food, promote gastrointestinal peristalsis, and promote the smooth discharge of stool, if it is difficult to defecate, you can give a corked solution to help defecate. Second, you can give warm salt water bath or 1:5000 potassium permanganate bath, which can promote perianal blood circulation and improve the healing of perianal wounds. Third, if the anal fissure wound is longer, the wound fissure is deeper, and the pain symptoms are more severe, you need to perform surgical treatment, i.e. anal fissure removal.