If there is still bleeding after menstruation, consider if the menstruation is not completely clean and there is a small amount of blood in the uterine cavity which is drained out after activity and manifests as vaginal bleeding. The bleeding may be caused by vaginitis or cervicitis. An internal examination is needed to identify whether the bleeding comes from the uterine cavity or the cervix or vagina. If it happens occasionally, the bleeding will stop on its own and can be observed. If it occurs frequently, you should go to the hospital for pelvic ultrasound, gynecological internal examination and sex hormone test to see if there is endometrial thickening, intrauterine bleeding, endocrine disorder, cervical masses, etc., which can cause irregular vaginal bleeding. You should pay attention to rest, don’t stay up late, eat less spicy and stimulating food, and keep your mood relaxed, which is good for maintaining regular menstruation.