Most of the menstruation will be regular about 3-6 months after the menarche, mainly because the ovarian function is not particularly well developed at the time of menarche, there may be endocrine effects, so it will lead to irregular menstruation, sometimes early, sometimes postponed, and sometimes there will be menstrual dripping. When a girl has just had her period, she must pay attention to keeping warm, do not drink frozen drinks, do not do strenuous exercise, it is best to change sanitary napkins regularly, keep the vulva locally clean, strengthen the local care of the vulva, and it is also recommended to rest as much as possible when you have your period, to ensure sufficient sleep, which will play an auxiliary role in the regularity of menstruation in a short period of time.