When using sanitary napkins, tear the paper tape on both sides and stick them to the back of the underwear. The process of unwrapping and sticking the sanitary napkin with your hands will touch the surface of the sanitary napkin, and if your hands are not washed clean, they will be prone to bacteria, so you need to wash your hands before unwrapping it. When using the sanitary napkin, tear the paper tape with adhesive effect on the sanitary napkin, paste it to the appropriate position of the underwear, so that the menstrual blood can be fully absorbed by the sanitary napkin. Women’s external genitalia directly connected to the outside world, the immune system is relatively low during menstruation, easy to be infected, must pay attention to local hygiene, change sanitary napkins diligently. You should change your sanitary napkin every 2-3 hours during the day and a new one before going to bed. Avoid using medicated or scented sanitary napkins. Don’t use pads during non-menstrual period. Some girls use pads every day in order not to have to change and wash their panties every day. But actually, this is very unhealthy practice. What private parts need is a breathable environment, and pads have a plastic film on the back that is airtight, which can easily lead to health problems in the private parts.