The increase in leucorrhea before menstruation occurs mainly because the endometrial glands secrete heavily and the cervical mucus becomes thin under the influence of hormone levels. With the vaginal secretions out of the body leads to increased leucorrhea. The leukorrhea is milky white, without odor and vulvar itching, and is physiological. If the leukorrhea increases before menstruation, pay attention to the daily washing of the vulva, keep it clean and dry, change underwear regularly, and do not recommend the use of pads, which are not well ventilated and can easily induce vulvodynia and vaginitis. With the gradual recovery of the body’s hormone levels, the leucorrhea secretion gradually decreases after the onset of menstruation, after the menstruation to the ovulation period, with the increase in hormone levels will appear leucorrhea, belong to the physiological causes of increased leucorrhea, physiological leucorrhea does not require treatment, good local care can be.