There are small rice-sized bumps inside the anus, which are considered to be anal papilloma, polyps, hemorrhoids and warts, and need to be further examined in order to clarify the cause. 1. anal papilloma: the anal papilla is long-term inflammation, fecal stimulation and the formation of benign tumors, most of the grayish-white, can be the size of a small grain of rice, with the increase and more have a tip. Patients can manifest as anal itching, incomplete defecation, blood in stool and other symptoms. 2. polyps: with heredity, feces, and inflammatory stimuli have a relationship, is growing in the anal canal mucosa of the superfluous organisms, anal fingerprinting can be touched more soft foreign body presence, mildly can be no abnormal symptoms, severe cases can be detached from the anus, anal itching and bleeding symptoms. 3. hemorrhoids: for mild hemorrhoids, can also have the size of a small grain of rice, more soft, no abnormal symptoms. If you don’t pay attention to your diet and lifestyle, it can lead to enlargement, bleeding and pain. 4. Condyloma acuminatum: a sexually transmitted disease, caused by human papilloma virus infection. It can be seen in the anus as a small rice grain sized bump, with the development of the disease can be manifested as cauliflower pattern, papilla-like swellings, hard to the touch. There are small rice-sized bumps inside the anus, it is recommended that patients go to the hospital in time to improve the relevant examination, a clear diagnosis, as soon as possible to give standardized and reasonable treatment.