Will the anus be examined during the colonoscopy? The colonoscopy will examine the anus. Usually, before the colonoscopy, we have to perform an anal examination to observe whether the patient has external hemorrhoids, whether the swelling can be palpated by the finger, and whether there is blood in the finger sleeve. We observe whether there are internal and external hemorrhoids, some swellings, polyps, and neuroendocrine tumors around the rectum and anal canal. If necessary, we can even perform a reverse mirror during retraction to further observe the lesions around the anus and anal canal. Therefore, we will definitely observe the anus during the colonoscopy, and if there is any abnormality in the anus, we will perform both forward and backward mirroring to carefully observe it.