In general, you can have intercourse about a week after your period. If you have intercourse just after menstruation, it may cause some inflammatory infections or even reflux of menstrual blood, so it is not suitable to have intercourse just after menstruation. Generally speaking, one week after the menstruation, the blood in the vagina or the uterus has been drained and the uterine opening is closed. Women should never have intercourse during their menstrual period because it can cause many diseases, pelvic inflammation, endometrial inflammation, and even endometriosis, which can cause menstrual pain.