There is no medical term for mycosis fungoides, it should be mycosis vaginalis, which is an inflammation of the vulva and vagina caused by Pseudomonas albicans. The main focus of mycosis vaginitis in pregnant women is to control the symptoms. Pregnant women who are suspected of having mycosis vaginalis need to seek prompt medical attention to confirm the diagnosis in combination with gynecological examination and vaginal discharge examination. Once diagnosed, treatment with azole antifungal drugs is recommended. To avoid affecting the safety of the fetus, pregnant women should be treated with intra-vaginal plugs to control symptoms and wait for complete treatment after delivery. Oral medication is prohibited. Wear cotton, loose underwear during treatment; pay attention to perineal hygiene; keep the vulva clean and dry; change and disinfect intimate clothing regularly; and prohibit sexual intercourse. Mycosis fungoides is an opportunistic infection. Normally, 10%-15% of non-pregnant women and 30% of pregnant women have Pseudomonas albicans parasites in their vagina, but the number is very small and does not cause inflammatory reactions. When pregnancy occurs, the vaginal environment changes due to the physiological characteristics of women, making it suitable for the survival of Pseudomonas albicans, which can multiply and cause mycosis fungoides. In order to protect the fetus, pregnant women with mycosis vaginalis should seek medical attention and not use medication without permission. Use medication in the form of intravaginal plugs and do not take oral medication. Improve immunity, pay attention to personal hygiene and prohibit sexual intercourse during treatment.