Before menstruation, there is tofu-dreg-like discharge, and accompanied by vulvar itching, the most common clinical cause is Candida albicans infection caused by vulvovaginal pseudomycosis, which is manifested as a large amount of discharge before menstruation, and during menstruation due to the alkaline menstrual blood, the corresponding clinical symptoms will be reduced, mainly because Candida albicans grows and reproduces in acidic environments, and under the flushing of menstrual blood, the number of Candida in the vagina is drastically reduced, so the corresponding symptoms will be reduced. The main reason is that Candida albicans grows and reproduces in an acidic environment, and the number of Candida in the vagina decreases drastically under the flushing of menstrual blood. After menstruation, medication must be given, because there is still Candida in the vagina, once the patient’s resistance drops or the environment is favorable for the growth of Candida, the corresponding symptoms will appear again, so medication should be given.