Anoscopy is routinely required for all hemorrhoid examinations. The examination of hemorrhoids includes visual examination of the anus, finger examination of the anus, and anoscopy. Anoscopy is mainly applied to the examination of lower rectum and internal hemorrhoids, which can observe whether there is any breakage of mucous membrane on the surface of internal hemorrhoids, whether there is local erosion, and whether there are polyps and lumps in the lower rectum and other diseases. However, anoscopy has its limitations, as it can only examine the intestinal and anal canal at a distance of about five centimeters from the anus. Therefore, anoscopy is not a substitute for colonoscopy in clinical practice. For example, some elderly patients with recurrent blood in the stool need to undergo colonoscopy in order to exclude rectal bleeding, which can prevent patients with blood in the stool from being mistaken for bleeding hemorrhoids and delaying the treatment of bleeding caused by certain diseases in the upper end of the intestine.