Although advanced diagnostic equipment such as CT, ultrasound and endoscopy are available, they cannot replace anal examination. There are many items of medical examination, but I am afraid that the most shy one is “anal examination”. According to statistics, 80% of intestinal cancers occur in the rectum, and 2/3 of them occur within the reach of the finger. However, as the most convenient and effective way to detect anorectal diseases, anal finger examination is often ignored and feared by people, and few patients take the initiative to do anal finger examination, so such a concept needs to be improved. What is anorectal examination? “Anorectal examination” is an examination in which the doctor touches the patient’s anus with his or her finger. More than 80% of rectal cancer patients can be roughly diagnosed through anal examination, and hemorrhoids, perianal (rectal) abscesses, infections, anal fissures, anal fistulas, cervical tumors, prostate enlargement or prostate cancer can be detected through this method. All of them can be detected by this method. Therefore, in clinical practice, patients with initial diagnosis and suspicious patients should be examined by rectal examination, and this important examination method must not be neglected, so as not to delay the early diagnosis of rectal cancer and other important diseases and the timing of surgery. However, due to the secrecy of the examination site, some patients are embarrassed to let the doctor examine them, resulting in the low utilization rate of this examination item. What diseases can be detected by anal finger examination? 1, rectal cancer: uneven hard lumps can be felt on the intestinal wall, and there can be ulcers on the surface, the intestinal cavity is often narrow, and the finger sleeve is often stained with pus, blood and mucus. 2, rectal polyps: soft and pushable masses can be felt, often stained with blood on the finger sleeve. 3, internal hemorrhoids: generally internal hemorrhoids are soft, even if you can feel them, you can not distinguish their size and number, but if there is thrombosis, you can feel a smooth hard node. 4.Anal fistula: you can feel the cords, and sometimes you can find small hard nodes or depressions in the inner mouth of the fistula. 5.Perianal rectal abscess: pelvic rectal gap abscess and posterior rectal gap abscess can be palpated in the rectum as a painful mass with a smooth surface. Other interstitial abscesses can be examined by double-finger palpation with the thumb and index finger, i.e. the index finger is placed in the rectum and the thumb is placed on the perianal skin, and palpation with the thumb and index finger can reveal deep anterior and deep posterior interstitial abscesses of the anal canal, abscesses of the scirorectal space or perianal abscesses. 6.Anal papilloma: a medium-textured and pushable, long-tipped swelling can be palpated, with a clean finger sleeve. 7.Perianal: skin disease, subcutaneous masses, inflammation, abscess, external hemorrhoids, and fistula fistula. In the finger examination, the physician’s index finger is the doctor’s eye, which can detect and diagnose most anal diseases. This includes functional diseases as well as organic diseases.