If you bleed again one day after your period, consider that your period is not completely over. The bleeding occurs again because the endometrial lining has not shed very regularly, or you have a fibroid-like disease. For details, you can see your doctor for an ultrasound to find out the condition of the endometrium. If the endometrium has not been completely shed, you can also take Yimoucao Punch or Angelica Pills under the guidance of your doctor to help drain the stagnant blood from the uterine cavity. If the menstrual period is very long, it may also be due to poor ovarian function. The late menstrual period is a secretory period, the estrogen level is low, and the endometrium grows slowly and is prone to constant bleeding.