It feels like menstruation, but after observation it is a large amount of watery discharge. This is often a case of increased secretion from the endometrial glands before menstruation, and it is important to keep the area clinically clean. In addition, if the watery discharge is accompanied by odor, it is likely to be caused by inflammation of the vagina or cancer of the endometrium or cervix. It is recommended to be treated carefully in clinical practice. Routine white belt examination, cervical cancer screening and ultrasound examination should be done to understand the endometrial condition and diagnostic scraping should be done if necessary. Therefore, it is necessary to give a specific analysis according to the specific situation and then do the corresponding examination in order to clinically understand whether it is a normal phenomenon or an abnormal phenomenon.