After hemorrhoid surgery, anal stenosis can usually be determined by the patient’s symptoms, anal diagnosis, and proctoscopy. After hemorrhoid surgery, if the patient has anal stenosis, the patient will usually have difficulty in defecation, stool thinning, with anal swelling, anal obstruction feeling. In severe cases, patients may experience bloating, nausea, vomiting, pain, bleeding and other symptoms. When the patient performs anal palpation, it is difficult or impossible to pass the index finger, and sickle, ring or tubular stenosis can be palpated. When performing proctoscopy, some patients can see the ring of stenosis, and there can be erosion and ulceration at the site of stenosis. The diagnosis is usually confirmed by combining the patient’s surgical history, symptoms, anal fingerprinting, and proctoscopy. After diagnosis, patients should actively cooperate with the doctor for treatment, such as anal dilation, light diet, do not eat spicy, greasy and other foods.