Vaginal bleeding again after clean menstruation does not necessarily mean menstruation. If there is a history of sexual intercourse with irregular vaginal bleeding, the first thing to do is to check if there is a pregnancy with pre-eclampsia, or the possibility of miscarriage. If you are sure that you are not pregnant, do an ultrasound to find out if you have endometrial inflammation, endometrial polyps, fibroids, etc. If the ultrasound is not intrauterine bleeding, women with a history of sexual intercourse should have their cervix checked for cervical polyps or inflammation of the cervix, etc. If the examination is normal and vaginal bleeding occurs about 1 week after menstruation, it may be ovulatory bleeding, which is relatively small and lasts for a short period of time without treatment. During the bleeding period, pay attention to keep the perineum hygienic, do not get cold and do not exert yourself.