Not dilating the anus after hemorrhoid surgery may result in outlet-obstructive constipation and bowel obstruction, but it is not necessary to dilate the anus after hemorrhoid surgery. Not dilating the anus after hemorrhoid surgery may result in narrowing of the rectum and anus, stools will become dry and formed stools will not be able to pass out of the body smoothly, resulting in exit-obstructive constipation, and in severe cases, even exit-obstructive constipation, hence the need to dilate the anus. However, not all patients need to expand the anus after hemorrhoid surgery, hemorrhoid surgery patients recover well, there is no rectal, anal stenosis phenomenon, circumferential hemorrhoidectomy of hemorrhoids is not much, the choice of advanced surgical program, etc., that hemorrhoid surgery patients do not need to expand the anus. It is recommended that the patient after hemorrhoid surgery regular review, to understand the body’s recovery, by the doctor to determine whether the need to expand the anus and other follow-up treatment.