For localized anal diseases, it is recommended to register with the Department of Anorectal Surgery. The main diseases commonly seen in anorectal surgery include internal hemorrhoids, external hemorrhoids, mixed hemorrhoids, anal fissures, perianal abscesses, anal fistulas, internal rectal mucosal prolapse, and acute and chronic colitis. After registering for anorectal surgery, you need to choose different treatment methods according to the symptoms and directions of different diseases. In case of internal hemorrhoids, external hemorrhoids, or anal fissures, it is recommended to perform anal finger diagnosis together with anoscopy. If perianal abscess or fistula is suspected, perianal ultrasound is recommended. For prolapsed rectal mucosa or loose rectal mucosa, fecal imaging is an option. For acute and chronic colorectitis, it is considered that there may be congestion and edema in the mucosa of the colon and rectum, so electronic colonoscopy should be performed, along with pathological tests if necessary. Common treatment modalities for perianal diseases include topical medications, oral medications or surgery.