It depends on your own personal cycle, mishap and how fresh you like to maintain your private area. Don’t worry, there is no standard as every BODY is different. If you have an extremely light day of just spotting while waiting for your first flow of blood, you can wear them that entire day. Once you have that first flow of about one tampon worth, you’ll want to rinse and wash them and exchange them for another pair. Oftentimes, young girls will wear them the days leading up to their period and the last day of their cycle when they bleed just a little here and there.