A hard bump at the anal opening can be caused by a variety of reasons. It can be a skin rash, papules, and urticaria caused by inflammation around the anus. If the rash breaks down, ulcers can be formed, causing itching and pain. Patients can be relieved significantly by diet, avoiding spicy foods, keeping the perineum clean, and giving drugs such as Paregoric Pine for application. If the patient’s hard bumps have a fluctuating sensation, become lump-like, and have obvious pressure pain, it can be considered to be caused by perianal abscess, which can be treated with antibiotics, choosing two antibiotics that are effective against gram-negative bacilli, continuing to give warm saline and herbal sitz baths, giving local physiotherapy, and if necessary, giving surgery. The surgical methods are perianal abscess incision and drainage or perianal abscess stitching. If the patient’s hard lump can be returned by itself and there is dripping blood after stool, it may be caused by mixed mole and other reasons. If the patient cannot make a clear diagnosis, it is recommended that the patient go to the local regular anorectal department for consultation and treatment, and then give symptomatic treatment after a clear diagnosis.