Teenage girls appear brown discharge is not necessarily menarche, may be because in the menstrual period before the vaginal discharge, also does not rule out the possibility that may be caused by vaginitis, teenage girls will usually be in the age of ten years after the body of sex hormones in large quantities of secretion, at this time there will be a succession of secondary sexual characteristics, including the emergence of breast development, pubic hair growth and so on. If there is currently a brown vaginal discharge, indicating that the endometrium of the girl has a small amount of bleeding, at this time, we must do a good job of personal hygiene management, but also to give the child a good physiological counseling, because in the emergence of brown discharge, may soon have menstruation. In the emergence of secondary sexual characteristics within two years after the onset of menstruation, the need for girls to be psychologically prepared, if the girl has a brown discharge, at the same time there is leukorrhea such a situation, usually indicates that two to three days will have menstruation.