The girl menarche only a little brown is generally normal, you can temporarily observe. Girls menstruation, at the beginning of the menstrual blood is relatively small or the menstrual blood discharge is not smooth, will be in the vagina, the uterine cavity to stay for a period of time, easy to be oxidized into brown, serious when the performance of the black, discharged only a little bit of brown, there are no other abnormal symptoms, is generally a normal phenomenon. The first menstruation of the girl, ovary, hypothalamus, pituitary control function development is not very mature, the endothelial stripping repair is not good, the amount of bleeding is small and bleeding time is abnormal. It can be temporarily observed first, the girl should correctly learn to use sanitary napkins, pay attention to the cleanliness and hygiene of the perineum. As the gonadal axis matures, menstruation will gradually return to normal. Usually observe the menstruation with abnormalities, you can also go to the hospital for examination.