Vaginitis is not exclusive to adult women or women who are sexually active. Young girls, especially those under 5 years old, can also get vaginitis, called infantile vaginitis or infantile vulvovaginitis. This is due to the anatomical and physiological characteristics of young girls, including poorly developed vulva (unable to cover the urethra and vestibule, making it easy for bacteria to enter), low estrogen levels (thin vaginal epithelium, low sugar sources, elevated pH, low vaginal resistance, and easy infection), and also due to lack of attention to vulvar hygiene and misplaced foreign objects in the vagina. The clinical manifestations of vaginitis in infants and children are mainly increased vaginal discharge, which is purulent in nature. The large amount of purulent discharge stimulates the vulva and causes itching, which is often characterized by crying, irritability, or scratching with the hands. In severe cases, vulvar congestion, vulvar surface ulcers and labia minora adhesions may occur. In cases of labia minora adhesions, the urinary stream often becomes thin or divergent during urination. In addition, because the urethra is adjacent to the vagina, some children may have urinary tract infections and experience frequent, urgent, and painful urination. When the above symptoms occur, it may be infantile vaginitis, but it still requires professional medical judgment and laboratory tests to determine.