Anal examination includes anal visual examination and anal finger diagnosis. Anal visual examination is to check whether there are any abnormal growths around the anus, whether there is local redness, swelling, discharge, abnormal bulge, and whether there is bleeding. The anal finger examination is to enter the patient’s anus to check the lower rectum and local diseases of the anal canal. It can check the tightness of the anal sphincter, whether there is inflammation of the anal sinus, whether there is hypertrophy of the anal papilla, whether there is local abscess, hard mass, whether there is pressure pain, and also whether there are polyps in the lower rectum and whether there are rectal tumors, and it is necessary to observe whether there is blood on the finger sleeve when the finger sleeve is withdrawn. Anal examination finger and visual examination are more frequently used in clinical practice, and are examination methods that every anorectal surgeon should be skilled in.