If the bleeding is not heavy and there is no abdominal pain, or if it clears in two to three days, you can observe it for the time being and not deal with it. If the bleeding is heavy or there is abdominal pain and other uncomfortable symptoms, you need to go to the hospital for examination, you can perform gynecological examination to understand the situation of the cervix, whether there are cervical polyps and cervical erosion, and ultrasound examination to understand the uterine adnexa and the situation of the endometrium, whether there are endometrial echogenicity, or submucosal leiomyomas, endometrial polyps and other abnormalities, and based on the results of the examination, we will provide effective treatment for the symptom. Bleeding again three days after menstruation may be caused by endometrial polyps, submucosal fibroids, or diseases caused by endocrine disorders, which need timely and effective treatment.