The built-in tampon is a menstrual sanitary napkin placed in the vagina, which gently adheres to the vaginal wall and can absorb all menstrual blood in the body. So it can prevent leakage and keep the body clean and dry. Because the tampon is stuffed into the vagina to form a closed space, if it is not changed regularly, it is easy to lead to the rapid growth of normal bacteria in the vagina and cause infection and inflammation. When the menstrual blood volume is too low, if you don't change the tampon diligently, the menstrual blood will flow back after prolonged use, which may cause gynecological diseases such as endometriosis. If used, it should be changed every 2-3 hours. Previous page: How to choose sanitary napkins