Dilating the anus may cause proctitis, may cause constipation to become more severe as well as may damage its own muscles, leading to fecal incontinence. 1. Causes proctitis: anal dilation may dilate the rectum, which may be slightly broken after dilation. Due to defecation and other conditions, there are relatively more bacteria in the rectum, and patients with low immunity will be invaded by bacteria, and then proctitis and other inflammatory diseases will occur. 2. Constipation is more serious: part of the expansion of the anus is used for constipation, and the long-term use of the expansion of the anus may lead to a decrease in the sensitivity of the rectum, which will lead to constipation aggravation. 3. Lead to fecal incontinence: long-term dilatation will damage the sphincter of the anus itself, and the damage caused by irreversible, will cause sphincter relaxation, which will lead to the occurrence of fecal incontinence. Therefore, anal dilatation should not be done without necessity, and if there is any discomfort, it is necessary to consult a doctor and follow the doctor’s instructions for treatment.