Intercourse during menstruation may induce inflammation of the reproductive system, and may also affect the amount of menstruation, menstrual cycle and so on. During menstruation, women will have endometrial stripping, there are traumas in the uterine cavity, and the cervical opening is in an open state, at this time, coitus may bring bacteria and other upstream infections into the vagina, thus inducing gynecological inflammation such as endometritis, pelvic inflammatory disease, vaginitis, and other gynecological inflammatory diseases. In addition, it may also affect women’s menstruation, which can be manifested in increased blood flow and prolonged menstruation. Menstruating women need to pay more attention to personal hygiene, to ensure that the vulva clean, change sanitary napkins, and avoid menstrual sex and tub bath. At the same time, menstruating women also need to pay more attention to appropriate rest, reasonable arrangement of work and rest, to ensure sufficient sleep, to achieve a combination of work and rest. Women should avoid sexual intercourse during menstruation, and if discomfort occurs after intercourse, they need to consult a doctor in time for targeted treatment.