Increased leucorrhea before menstruation is normal because the pelvic cavity is congested during menstruation and the glands of the endometrium secrete a lot, so there will be more leucorrhea. Generally, leukorrhea is composed of vaginal wall exudate, cervical mucus and endometrial gland secretion. When menstruation occurs, the pelvic cavity is filled with blood and the secretion of these glands increases, so the leucorrhea increases. At this time, the leucorrhea is sticky, transparent and odorless. If there is an increase in leucorrhea before menstruation, cloudy leucorrhea, yellow leucorrhea or with vulvar itching, the leucorrhea has the possibility of infection, so the leucorrhea increases before menstruation, if you find abnormal color and taste, promptly go to the hospital and have the leucorrhea tested to see if it is trichomonas infection, mycobacterial infection or bacterial infection to take the necessary measures and rationalize the medication. If you find an increase in leucorrhea, go to the hospital in a timely manner and have a routine white belt test to clarify the cause so that you do not miss the diagnosis, and give treatment according to the test results.