Mycosis fungoides, medically called vulvovaginal pseudomycosis, was formerly called Candida vaginitis. It is a common vulvovaginal inflammatory disease in women caused by Pseudomonas. 1. Symptoms: Patients with mycosis fungoides have varying degrees of vulvovaginal itching, with symptoms that are sometimes mild and sometimes severe, lasting for a long time, and in severe cases, fidgeting, more pronounced at night. The vaginal discharge increases, and the discharge is white, sticky, curd-like or bean curd-like. Some patients may have vaginal burning, painful intercourse and painful urination. When the doctor checks the body, he can see erythema and edema in vulva, and in serious cases, there may be skin cracking and epidermal peeling; there are white lumps on the inner side of labia minora and vaginal mucosa. 2. Etiology and pathogenesis: Mycosis fungoides is an opportunistic infection. Normally, 10%-15% of non-pregnant women and 30% of pregnant women have Pseudomonas albicans parasitized in their vagina, but the amount is very small and does not cause an inflammatory reaction. Pseudomonas albicans can multiply and cause mycosis fungoides when the immunity of the body decreases due to the following conditions Such as long-term use of broad-spectrum antibiotics, heavy use of immunosuppressants or receiving large amounts of estrogen therapy; pregnancy, diabetes; fecal contamination of the vagina by people with gastrointestinal Pseudomonas infection; wearing tight fitting chemical fiber underwear and obesity that increases the local temperature and humidity of the vulva. Mycosis can be transmitted through sexual contact or contact with infected clothing. Therefore, it is recommended to pay attention to personal and sexual hygiene; keep the vulva clean and dry; change and disinfect intimate clothing regularly; and actively treat diabetes.