1. Light menstruation: If your menstruation is light, you may be able to wear your period underwear all day long and only change it once a day.
2. Moderate menstruation: For average menstruation, you should change your period underwear approximately every 4-6 hours to prevent leakage and maintain a fresh feeling.
3. Heavy menstruation: If your menstruation is heavy, you may need to change every 2-4 hours to avoid leakage and keep you fresh and dry.
Pay attention to how your period develops throughout the day and adjust your change interval accordingly to feel safe and comfortable.