The common methods to check the anus are anal finger examination, anal microscopy, proctoscopy, etc. The diseases that need to be checked by the anorectal department include hemorrhoids, anal fissure, anal fistula, perianal abscess, perianal eczema, anal pruritus, acromegaly, anal canal proctitis, and rectal polyps, anal papilloma, anal canal rectal cancer, etc. When there is blood in stool, perianal pain, constipation, anal itching, anal swelling, you need to go to the anorectal department to check the anus, usually pay attention to avoid spicy and stimulating food, keep the bowels unobstructed, keep the perianal area clean and dry, which can effectively prevent the occurrence of perianal diseases.