Female babies often have vulvovaginal inflammation due to poorly developed genital organs, as well as prolonged diaper padding, which may result in an impermeable lower body. Therefore, if your baby girl has a bad odor in her lower body, it is best to visit a hospital gynecologist or pediatrician to see if there is an obvious bacterial infection by taking the vaginal opening discharge for testing. If it is simply abnormal cleanliness, consider washing the vulva with povidone iodine solution with water and treating it with local application of erythromycin ointment. At the same time, it is recommended not to pad the diaper for the time being to prevent the vulva from becoming more inflamed due to the long-term lack of ventilation. You need to make your baby’s diet as light as possible, and if it is a baby girl who eats milk powder, you need to dilute the milk powder to avoid the obvious fire phenomenon.