Masturbation during menstruation can affect the amount of menstruation, when masturbation may cause the uterus to contract, which will not only increase the amount of menstruation. It will also cause prolonged periods or abdominal pain, which is very unfavorable to the health of menstruation. Masturbation during menstruation is very harmful to the body, during menstruation the body’s resistance decreases endometrial shedding, menstrual blood reduces the acidic environment of the vagina is easy for bacteria to grow. If the bacteria are brought into the reproductive tract during masturbation, it is easy to cause infections and various gynecological diseases, such as pelvic inflammatory disease, vaginitis, endometritis, cervicitis, and so on, and when it is serious, it will also trigger menstrual disorders. In addition, during menstruation can not cohabit, otherwise it is easy to cause pelvic infection, endometriosis caused by infertility, is very unfavorable to women’s health. Menstruation should pay attention to keep warm to avoid getting cold, pay attention to hygiene, can not take a bath, must be timely replacement of sanitary napkins, change underwear to avoid bacterial growth caused by gynecological diseases.