It is recommended that girls should wash the perineum every day if they are in a position to do so, but there is no certain time limit, and the frequency of washing the perineum can be decided according to the individual’s sense of discomfort. First of all, due to the special anatomical relationship of women, the vagina in front of and behind the urethra and anus respectively, at the same time, the vagina is not only the channel of menstruation and will produce secretions every day, not timely cleaning may cause urinary and reproductive system infections. Secondly, the female perineum is a private part, moist and sweaty, providing a very suitable environment for the growth of bacteria and fungi. So it is recommended that girls should wash the perineum every day to keep it clean and dry, to avoid the invasion of bacteria, fungi and other pathogens, women wash the perineum, it is best to use flowing water, wash the perineum from the front to the back, and finally wash the anus, and then dry it with a towel in time after the cleaning.