A painful black bag growing in the anus may be related to perianal abscess, anal fistula, hemorrhoids, condyloma acuminatum, rectal polyps and other conditions, which should be dealt with according to the cause through general treatment, medication, surgery and other methods. 1. Perianal abscess: this is caused by the infection of anal gland obstruction. Once perianal abscess is formed, there will be darker colored meatballs in the outer ring of the anus with severe pain. You need timely surgical treatment to incise and drain the abscessed area and clean up the purulent secretions inside. 2. Anal fistula: this is caused by the abscess not controlled in time, not only will there be black lumps, there will be anal moisture, itching and other symptoms. It needs to be treated by hanging surgery and other surgical methods. 3. Hemorrhoids: hemorrhoids outside the anus will form hemorrhoidal nuclei, hemorrhoids, the color of the hemorrhoids is usually purplish red or black red, accompanied by pain and itching symptoms. Available potassium permanganate solution sit bath, applying hemorrhoid cream, oral diosmin tablets and other medications, serious treatment through the external peeling ligation, internal hemorrhoid ligation and other treatments. 4. Condyloma acuminatum: this is caused by HPV virus infection, patients will appear around the anus gray or dark gray flesh bumps, may be papillary or corns. You need to apply imiquimod cream and other treatments, and if necessary, use laser treatment, cryotherapy, surgical removal and other methods of treatment. 5. Rectal polyps: If a rectal polyp prolapses, it will form a black ball of meat outside the anus. Timely surgical removal of the polyp is needed, and pathologic examination is required if necessary. Because of the causes are more, it is recommended that patients seek timely medical treatment, clear diagnosis, strictly comply with the doctor’s instructions for treatment. The above medication is used under the guidance of a doctor.