In girls, the ovaries are not yet functional, the vaginal mucosa is thin, without folds, with only a few layers of epithelial cells, no glycogen in the cells, no lactobacilli in the vagina, little vaginal secretions, and the natural defenses of the vagina are not yet in place, making them susceptible to bacterial infection and inflammation. The most common types of inflammatory diseases are female-specific vulvovaginitis and atopic vulvovaginitis (the latter mainly includes trichomonas, mycobacteria and gonorrhea). Etiology of non-specific vulvovaginitis: filth and dirt are the most common causes; intestinal parasite carriers; foreign bodies accidentally entering the vagina, causing foreign body vaginitis; others such as nylon silk, artificial fiber underwear, soaps and detergents, and topical medications can cause allergic vulvovaginitis. Clinical manifestations: Most commonly seen in girls aged 3-7 years, rare in mammals. Children complain of burning, itching, edema and inflammatory redness of the vulva, and a large amount of purulent discharge from the vaginal opening. Treatment: If the above symptoms appear, it is recommended to consult a gynecologist as soon as possible for timely diagnosis and treatment. Prevention: Strengthen hygiene guidance, wear crotch-sealing pants for young girls as early as possible, wash hands before and after meals, develop the habit of wiping from front to back after defecation, wash vulva regularly, change underwear regularly, and keep vulva clean.