If a girl is menstruating for the first time, the duration of menstruation varies depending on the individual. Some people will have a shorter period and be completely clean within a week, while others will have a period that lasts for more than 10 days. This is mainly because the ovaries do not function well when you first get your period, so the timing, cycle and volume of your period are unstable. After three months or six months of menstruation, menstruation gradually becomes more regular. If you get your period for the first time at menarche and if it lasts for more than ten days, it is advisable to go to the hospital for the appropriate examination. And it is recommended to take care of your vulva when you first get your period by changing sanitary napkins regularly and washing your vulva with warm water twice a day.