Sanitary towel is a kind of sanitary products used by women during menstruation. The main material is polymer and polymer composite paper formed by cotton, non-woven fabric, paper pulp or above material complex. The side design is mainly used to prevent side leakage. When using, first tear off the middle of the paper tape, glue the glue side to the middle of the underwear, and stick the two "ears" to the narrowest part of the pants. Other common menstrual products include tampons, menstrual cups, pads, etc. In the selection of sanitary napkins should pay attention to the material composition, health standards and their own actual situation. When using sanitary napkins, you should pay attention to storage conditions, use health, and pay attention to the frequency of replacement, otherwise it is easy to cause gynecological diseases. As a product for menstrual use, sanitary napkins have encountered a lot of social stigma, and menstrual poverty (that is, it is difficult to obtain sanitary napkins and other supplies) and menstrual shame are widespread in many countries and regions around the world, which has caused trouble to women's education opportunities and living conditions.