There is a hard lump inside the anus, which may be related to internal hemorrhoids, anal fistula, intestinal polyps and other conditions. 1. Internal hemorrhoids: if the patient has internal hemorrhoids, will form a meatball inside the anus, with the gradual increase in the size of the meatball, will lead to the narrowing of the space inside the anus, the anus will have a feeling of swelling, stool may also have meatball prolapse. 2. Anal fistula: If the perianal abscess is not treated in time, it may form an anal fistula, forming an abscessed meatball inside the anus, resulting in moist, itchy anus and other symptoms. 3. Intestinal polyps: If the polyps inside the intestine increase in size, there will be polyp prolapse, and the increased polyps will press the anus, making the anus feel bloated, or accompanied by a sense of defecation. Anal swelling inside the hard lumps, in addition to the above, there may be other factors, it is recommended that patients go to the hospital in a timely manner to do the relevant examination to identify the causes of the disease, if necessary, follow the doctor’s instructions for treatment.