Vaginal bleeding again after menstruation may be related to anovulatory dysfunctional uterine bleeding, or it may be caused by ovulatory bleeding or endometrial lesions. 1. Anovulatory dysfunctional uterine bleeding: this cause of menstrual bleeding is not caused by the withdrawal of reproductive hormones, but by the fact that when there is no ovulation, the ovaries can only secrete estrogen and cannot produce progesterone. Therefore, the endometrium does not exist in the secretion period and cannot be completely shed, and then there is a phenomenon of partial shedding here and there, which will show the phenomenon of vaginal bleeding again after menstruation. 2. Ovulation bleeding: If a woman is in the ovulation period, the estrogen will drop temporarily due to the discharge of the egg, which will lead to partial shedding of the endometrium and vaginal bleeding. 3. Endometrial lesions: such as endometritis, endometrial polyps, etc., when the woman has these endometrial lesions, it will also cause irregular vaginal bleeding phenomenon, which can be manifested in the case of vaginal bleeding after menstruation. Vaginal bleeding after menstruation may also have other causes, it is recommended to go to a regular hospital as soon as possible, by the doctor’s guidance according to the specific clinical manifestations, targeted examination and treatment.