A smooth lump in the perianal area may be hemorrhoids, rectal polyps, warts and so on. 1. Hemorrhoids: a long time to stay up late, irregular work and rest, excessive spicy stimulating food, long-term constipation and diarrhea, a long time sitting and standing, etc., can lead to the occurrence of hemorrhoids, can be seen in the perianal area there is a pimple phenomenon. At this time, it is recommended to improve lifestyle, diet, prevent constipation and diarrhea, keep the anus clean. 2. Rectal polyps: is the rectal mucosa elevated and caused by superfluous organisms, its larger can be detached from the anus, resulting in perianal appear smooth lumps of meat. The polyp is connected with a thin tip, round or oval, easy to bleed when touched, and can also be incorporated into the anus. 3. Warts: mainly due to the infection of human papilloma virus (HPV) caused, will lead to the external genitalia and anus around the appearance of a single or more pimple-like, papillary, cauliflower-like, crown-shaped moist fleshy superfluous organisms. Their surfaces are rough and uneven, accompanied by a foul odor, and they bleed easily when touched. When there is a smooth lump in the perianal area, there may be other causes of disease, such as anal papilloma, etc. It is recommended to go to the hospital as soon as possible to clarify the cause of the disease, so as to facilitate targeted treatment.