Small particles around the anus are usually caused by infections, inflammatory stimuli and other causes, such as perianal inflammation, condyloma acuminatum, perianal eczema and other causes. The main manifestations are itching around the anus, pain, increased secretion, stool wiping. 1. Perianal eczema: due to the perianal skin environment moist or clean untimely, inflammation stimulation caused by the perianal skin pain, itching, rash-like pimples, red rash. 2. Perianal inflammation: mainly because of the bacterial infection caused by the occlusion of sweat glands, mainly manifested in the perianal skin redness, swelling, heat, pain, itching, single or multiple pea-sized nodules in the anus, easy to form ulcers, recurrent episodes. 3. Warts: Infected by human papilloma virus (HPV), most patients have a history of unclean sex, hygiene products sharing infection. The main manifestation of the perianal skin wart-like organisms, papules around the genitals, cauliflower granules. There are small particles around the anus, first of all, we should go to the hospital in time for examination, to clarify the cause of the disease, to be treated with medication or surgery under the guidance of a professional doctor. Do not change the drug without authorization, so as not to cause adverse consequences.