Bleeding just after menstruation can be caused by pregnancy, such as pre-eclampsia, ectopic pregnancy or biochemical pregnancy, which may occur, you need to first draw blood to check the blood HCG value. If the blood HCG value rises, it suggests that it is caused by pregnancy, and you need to further combine with the gynecological ultrasound to decide how to deal with the next step. Bleeding after menstruation can also be caused by endometrial polyps, IUD displacement or submucosal fibroids, etc. In this case, further gynecological ultrasound examination is needed to determine the next step of treatment according to the gynecological ultrasound. Bleeding after menstruation can also be caused by menstrual disorders, for which further examination of gynecological ultrasound and sex hormone six items are needed to decide on the next step of treatment according to the examination.