The small lumps felt in the perianal area may be caused by external hemorrhoids, anal polyps, rectal prolapse, and perianal abscesses. 1. external hemorrhoids: the anal area supportive tissues such as submucosal venous plexus congestion and swelling and lead to the formation of bulging hyperplasia, occurring in the dentate line below the part of the hemorrhoids known as external hemorrhoids, so it will be in the perianal feel small lumps. 2. anal polyps: chronic inflammatory stimulation, genetic mutation, long-term constipation and other factors lead to benign proliferation of anal area tissue, the formation of polyps, so will be felt in the perianal small lumps. 3. Rectal prolapse: the whole layer of rectal wall or the mucous membrane layer of rectum is partially exposed outside the anus after prolapsing through the anus, thus small lumps are felt in the perianal area. 4. Perianal abscess: acute purulent infection of the soft tissues around the rectum and anal canal due to bacterial infection, resulting in the formation of localized abscesses, which leads to the above manifestations. Perianal lumps may be related to a variety of factors, it is recommended to go to the hospital in a timely manner, a clear diagnosis, and give treatment as soon as possible to avoid aggravation of the condition.