In general, mycosis is not contagious because it is not caused by sexual or indirect contact, but rather by a dysbiosis of the vaginal flora, which is caused by the proliferation of mycobacteria in the vagina. The most common cause of mycosis is the long-term use of broad-spectrum antibiotics or immunosuppressants, or even the lack of hygiene during intercourse, which leads to a change in the ph value of the vagina or a decrease in the resistance of the vagina, which leads to the proliferation of mycobacteria in the vagina and then triggers mycosis. The mycotic vaginitis is actually an endogenous infection, not an exogenous infection, so it is not contagious. When women develop mycotic vaginitis, they will have abnormal leucorrhea discharge, such as beanbag-like leucorrhea, and also vulvar itching and other abnormal discomfort, which requires vaginal medication, such as clotrimazole suppositories, dacrynic acid suppositories, or nifurtimox. If necessary, oral fluconazole capsules may be required. Since the acidic environment in the vagina increases when a woman has mycosis fungoides, alkaline liquids such as baking soda lotion should be used to wash the vulva. During the treatment of mycosis vaginalis, intercourse must be prohibited. Since mycosis vaginalis is prone to recurrence, it is necessary to review the routine leucorrhoea after the treatment to confirm the cure of mycosis vaginalis.