It is not normal for patients to have two menstrual periods in a month. In clinical practice, this situation is most commonly seen in ovulation bleeding, that is, patients have a normal menstrual period to the time of ovulation and a small amount of bleeding, which will be cleared within 3-4 days, and is not accompanied by any clinical symptoms, or there is a slight abdominal distension and discomfort. When it occurs occasionally, no special treatment is needed. When it occurs 3 or more times in a row, the patient needs to exclude organic lesions through gynecological examination, gynecological ultrasound, hysteroscopy, tumor marker examination and so on. If it is just simple ovulation bleeding, patients can be treated by taking short-acting contraceptive pills, such as Eucerin and Dayin-35.