Anal sex may cause hemorrhoids, repeated friction during anal sex may lead to relaxation of the muscles around the anus, and friction may also lead to local edema of the anal skin, and rectal mucosa, which may cause the patient’s anal cushion to move down, thus triggering the production of hemorrhoids. Local stimulation may also lead to congestion and pathological varices in the blood vessels under the anal skin and rectal mucosa, so anal sex is not suitable to be used. In addition, anal intercourse may also lead to damage to the skin or mucous membrane around the anus, resulting in the production of anal fissures, local infection, which may also cause the formation of diseases such as anal sinusitis or even perianal abscess, all of which may lead to local pain, bleeding, itching and other symptoms around the anus.