A lump in a child’s anus may be the result of hemorrhoids, perianal abscesses, and infectious molluscum contagiosum. 1. Hemorrhoids are caused by swollen veins in the rectum and anus, which can lead to swelling around the anus, which may form a lump, and may be accompanied by pain and discomfort in the area, especially during bowel movements. It may be accompanied by pain and discomfort in the area, especially during defecation. Attention should be paid to dietary regulation to prevent constipation, and surgical treatment is needed if necessary. 2. Perianal abscess manifests as a painful boil near the anus and may be caused by lack of attention to local hygiene or constipation. It may be accompanied by persistent pain and localized swelling. Perianal abscesses are serious enough to require incision and drainage of the abscess. 3. Molluscum contagiosum is a viral disease that can lead to the formation of lesions called pimples on the skin, which may be caused by contact with the patient’s used bathroom personal products. The reason why the child anus long a pimple is more, it is recommended that parents take the child to the hospital in time for consultation, clear cause for targeted treatment.