There is a lump next to the anus, and the main diagnoses considered are: 1. cyst of the perianal sebaceous gland. It is a benign disease that gradually increases in size and may affect the function of defecation, and treatment only requires excision under local anesthesia; 2. The diagnosis under consideration is perianal abscess, which in most cases will have redness, swelling and heat in the anus, and when there is pus formation, the pus will increase the pain and there will be systemic symptom changes, and the occurrence of perianal abscess can only be solved by surgery; 3. The lump next to the anus may be a perianal If the boil occurs, if the purulent infection, the infection needs to be surgically incised and drained to draw out the pus; 4, consider the anal fistula, the anal fistula will also appear next to the anal lump, the emergence of anal fistula also need to do surgery to solve.