Anal finger examination can check perianal diseases, prostate diseases, rectal diseases and so on. 1. Perianal diseases: through anal fingerprinting can check the anus and its surrounding diseases, such as perianal cysts, anal fissure, internal and external hemorrhoids, anal fistula, eczema and so on. At the same time can also determine the degree of anal sphincter tightness, because when the anus or around these abnormal lesions, it is easy to accompany the phenomenon of redness, swelling, hard lumps, lumps and so on. 2. Prostate disease: anal fingerprinting can assess the health of the prostate, detect and diagnose hyperplasia or tumors in advance, and through the pressure on the prostate gland can also be extracted for further testing of prostate fluids. 3. Rectal disease: anal fingerprinting can do a preliminary assessment of the health of the rectum, if there are rectal polyps, tumors or rectal stenosis and other phenomena, can also be judged through this examination. Relevant studies have shown that 85% of rectal cancers are detected through anal fingerprinting. It is recommended that patients with perianal discomfort should go to regular hospitals to do relevant examinations in a timely manner to clarify the cause of the disease and actively cooperate with doctors for treatment so as to avoid delaying the condition.