The dryness of a girl’s bottom is often caused by the following reasons: 1. the decrease of vaginal secretion due to some kind of vaginal inflammation, which makes the vagina appear dry; 2. the decrease of estrogen caused by the decrease of ovarian function, which makes the cervical secretion and vaginal secretion decrease; 3. the destruction of the cervical glands due to some treatment of the cervix, which makes the local secretion of the cervix decrease, and the vaginal secretion will decrease accordingly; 4; 4. Due to long-term chronic inflammation or inflammation of the vulva, the vestibular ducts are blocked. In this case, when having intercourse, it is impossible for the vestibular fluid to be ejected, so the vagina will feel a little dry during intercourse. It is recommended to give different treatments according to different causes.