There are many reasons for the visible lumps around the anus: 1, there may be mixed hemorrhoids, mixed hemorrhoids is the varicose vein vascular mass, abdominal pressure increases or constipation can easily lead to pathological hypertrophy of the anal cushion, downward movement out of the anus and formation. If the prolapse of the mixed hemorrhoids did not form a thrombus, can be seen in the soft, movable mass. If the local formation of thrombus, hemorrhoidal vein stagnation and swelling for a long time, it is easy to form a purple color, hard, touch with pain mass. 2, if the anal gland infection will be spread along the anal canal to the perianal skin, so that the anus around a lump, fluctuation is positive, perianal ultrasound can be a clear diagnosis. 3, around the anus from the lump may also be the cause of the rectal polyps, if the location of rectal polyps is lower, closer to the anus, long term, the rectal polyps may be the reason that the rectal polyps are not in the anus, the rectal polyps are not in the anus. If the location of the rectal polyp is relatively low and close to the anus, the long-term stimulation of the stool will easily make the polyp come out of the anus. The anus can be visualized, rectal palpation, and if necessary, anoscopy or perianal ultrasound can be performed to make a clear diagnosis.