About 70% of rectal tumors can be detected by finger examination, so it is also known as “finger examination eye”. Through finger examination, we can understand the orifice of anorectum, the tension of sphincter muscle, whether there are new organisms in the rectal canal and their location, size, shape, nature and activity degree. In patients with constipation, the tension of the rectovaginal diaphragm, the tension of the puborectal muscle, and the looseness of the rectal mucosa can be detected when they struggle. In the front of the rectal jugular, the prostate and bladder can be felt in men; in women, the cervix and the posteriorly inclined uterine body can be felt. The sciatic tuberosity and lateral pelvic wall can be palpated on both sides. The tailbone and sacrum can be palpated posteriorly. Operation method: Generally speaking, anorectal examination can be divided into two parts: extra-anal examination and intra-anal examination. The method of extra-anal finger examination is: after wearing gloves, use the index finger to touch the anus for hard knots, swellings and pressure pain, and to check whether there are fistulas and cords under the skin outside the anus. The internal anal finger examination is what we often call anorectal finger examination. The examination method is: after wearing gloves or finger covers, in the index finger and anal area coated with some lubricant, the index finger into the rectum of the examination. The method of rectal finger examination: 1. The method of extra-anal finger examination is: after wearing gloves, use the index finger to touch around the anus for hard knots, swellings and pressure pain, and for fluctuating sensations, and check whether there are fistulas, cords and directions under the skin outside the anus. 2, the anal finger examination inspection method is: after wearing gloves or finger cover, in the index finger and the anal area coated with some lubricant, the index finger into the rectum to check.