Generally speaking, the hymen is 1 to 2 centimeters away from the outside, which is the vaginal opening. The hymen is a kind of muscular tissue between the female vagina and vulva, evenly distributed in all directions at the vaginal opening, with a hole in the middle that allows menstrual blood to flow out of the vagina. The hymen can be ruptured due to reasons such as sexual intercourse and strenuous exercise, and cannot be repaired on its own after rupture. The hymen can play a role in protecting the female reproductive system, reduce the role of pathogenic bacteria infection, due to the female vaginal mucosa is relatively weak, their own resistance to bacteria is relatively poor, and the hymen can resist bacterial invasion, play a role in protecting the female reproductive system. It is recommended that women in their daily lives, must strengthen the local care of the vulva, to change sanitary napkins during menstruation, to avoid infection with bacteria, resulting in the occurrence of inflammation. If you have any other questions, it is recommended to consult a professional doctor for guidance.