Three months after hemorrhoid surgery, the anus is a little small, usually due to postoperative scar contracture, does not affect defecation is normal, affecting defecation is not normal. After hemorrhoid surgery because the wound is open wound, after recovery will form a scar, scar contracture will appear anal narrowing situation, under normal circumstances, the anus can accommodate more than two fingers, are normal, will not affect defecation, if the anal stenosis is serious, affect defecation is not normal, you can expand the anus, stenotomy, etc. for treatment. After hemorrhoid surgery, you should have a regular review to check the recovery of the anus, to avoid anal stenosis, bleeding and other complications, daily attention to a light diet, avoid spicy food stimulation, and develop a good bowel habit. Once anal stenosis is found, it is recommended to give diagnosis and treatment as soon as possible to avoid aggravation of the condition.