The perianal area means the area around the anus, which refers to the area around the anus and the periphery of the anus, i.e., the area around the anus of 2-3 cm is the perianal area. Since the anus is the exit for excreting waste from the body, the perianal area is prone to a series of diseases due to the erosion of feces and urine. Common perianal diseases include internal and external hemorrhoids, perianal abscess, anal fissure, anal sinusitis, anal fistula, and anal papilloma. Once suffering from perianal diseases, it will cause the normal anal basic function of human body to a certain extent, leading to difficulties in excretion or uncomfortable painful swelling of the anus and other symptoms, which may affect normal life in serious cases. The perianal area is a generic term for the area near the anus. If the area is infected or has other symptoms, you need to go to the hospital in time to avoid the situation getting worse.