Leukorrhea is the vaginal secretion of women, which is a mixture of cervical mucosal exudate, cervical canal and endometrial gland secretion. The formation of leukorrhea is related to the action of estrogen. Normally, the quality and quantity of leukorrhea change with the menstrual cycle. The appearance of increased leukorrhea can be caused by the following aspects, which are physiological: First, when the ovary is about to ovulate in the middle of the woman’s menstrual period, due to the strong secretion of the cervical glands, the leukorrhea can become more abundant, transparent, slightly viscous, like egg white. Second, before menstruation because of pelvic congestion, vaginal mucosal exudate increased, leukorrhea will also become more. Third, after pregnancy, due to the increase in the level of estrogen in the body, this time the leukorrhea will also appear to increase, these are physiological. Under normal circumstances, the color of the leukorrhea is white and has no fishy smell. However, when the amount of leukorrhea increases and the color changes or there is a fishy smell, it is considered to be abnormal, and most of them may be inflammation of the reproductive tract and malignant diseases, both of which can lead to a change in the nature of leukorrhea. If the amount of leukorrhea increases, and the color changes, or the nature of the change, you need to consider going to the hospital to find out the cause, and then targeted symptomatic treatment.