Children with leucorrhea and pain in the perineum may be related to vulvitis, vaginitis, trauma, and so on. 1. Vulvovaginitis: it may be related to poor local hygiene of the vulva, wearing tight chemical fiber underwear for a long time, fecal stimulation, etc., and can be manifested as vulvar itching and pain. 2. Vaginitis: it is commonly caused by bacteria and other pathogens infection due to poor hygiene and uncleanliness of the vulva, resulting in inflammation of the vagina, which may cause redness, swelling and pain of the perineum. 3. Trauma: It may be due to the damage to the vulva caused by bicycling or playing, most commonly seen in straddle injuries, which can be manifested as perineal pain. There are other causes of perineal pain in children with leukorrhea, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, in the doctor’s help to clarify the cause, and targeted treatment or therapy.