Preventing anal stenosis from occurring after external peeling and internal ligation mainly includes preoperative, intraoperative and postoperative aspects. 1. Preoperative: for people in the acute stage of hemorrhoids, it is generally not recommended to operate immediately, mostly because at this time of surgery, swollen hemorrhoids will not only increase the difficulty of the operation, but also lead to surgical resection of too large an area, postoperative recovery period of normal contracture of the scar will exacerbate the anal stenosis. Therefore, it is generally recommended to first conservative treatment to remove edema, and then surgical treatment. 2. Intraoperative: The resection program should be well designed during the operation, which can not only remove the hemorrhoidal nuclei, but also retain enough area of skin bridge to promote wound healing and prevent anal stenosis. 3. Postoperative: After surgery, patients should pay attention to the daily dressing change, and during the recovery period, they should be dilated to prevent stenosis; for patients who have already formed stenosis, they can be given a second operation to cut the anal sphincter to improve the symptoms of stenosis. For patients with stenosis, a second operation to incise the anal sphincter can be performed to improve the symptoms of stenosis. Specific treatment options should be chosen under the guidance of a doctor to avoid delaying the condition.