Girls usually start having vaginal discharge around the age of 12. Girls usually start having discharge when they reach puberty around the age of 12. During this time, the girl’s reproductive system starts to develop and mature, and some girls will have their periods, the endometrium will shed and the uterus will secrete mucus, thus producing vaginal discharge. When a girl has discharge, she can wash her vagina with clean, warm water every day to avoid the growth of bacteria. The time of discharge is different for each girl, so parents should not worry too much. If a girl does not have discharge until she reaches adulthood, there is a possibility that her reproductive system has become diseased, so parents should take their child to the hospital for a physical examination and early treatment. After a girl’s discharge, she should pay attention to cleaning her body, changing her underwear in time, minimizing the use of pads and not using private care solutions, which are more stimulating and can upset the vaginal acid-base balance.