The itchy perineum is considered to be related to vaginitis and vulvovaginitis. 1. Vaginitis: for patients with bacterial, trichomonas or mycobacterial vaginitis, due to the large number of anaerobic bacteria, trichomonas, pseudofilamentous yeast reproduction in the vagina, the secretion increases and leads to local congestion and edema of the vagina and the vulva, the vascular permeability increases, and then there is itching of the vulva, and the local tissues impregnated with vesiculation and the formation of a small fissure. 2. Vulvovaginitis: if women do not pay attention to personal hygiene, wear airtight underwear, it is easy to lead to vulvar local bacteria and other pathogens multiply, which in turn cause vulvovaginitis, women will be manifested as vulvar itching, local dryness and pain and other discomforts. For women with small itchy perineum, it is recommended that they go to the gynecology department of a regular hospital for consultation and active treatment under the guidance of the doctor after clarifying the cause of the disease.