Dark blood bumps at the anal opening, consider with perianal abscess, hemorrhoids, warts and other diseases, need to go to the hospital for examination to clarify the cause of the disease. 1. Perianal abscess: generally due to bacterial infection of the tissues around the anus, forming an abscess, which causes the phenomenon of dark blood bumps on the anal opening. Perianal abscess may cause pain, dysuria and other symptoms, and can be treated with surgery such as incision and drainage. 2. hemorrhoids: is due to varicose veins under the mucous membrane around the anus, blood rupture thrombus formation, thus causing the phenomenon of dark-colored blood lumps in the anus. Mostly seen in thrombosed external hemorrhoids, usually itching, pain and other symptoms, can take thrombosed external hemorrhoid stripping surgery and other surgery to treat. 3. warts: usually due to the human body is infected by the virus, resulting in red pimples around the anus, causing the phenomenon of dark-colored blood pimples in the anus. Warts usually appear pimples, superfluous organisms and other symptoms, can follow the doctor’s instructions to use imiquimod cream, phthalidin cream and other drugs to treat. If the phenomenon of dark-colored blood bumps in the anus, it may also be due to anal papillae hypertrophy, anal fistula and other diseases, it is recommended to go to the hospital in a timely manner for further examination, a clear diagnosis, under the guidance of the doctor to give treatment.