Mycosis vaginalis is a common occurrence during pregnancy. About 75% of women have had at least one episode of mycosis vaginalis in their lifetime, and 45% of women have experienced two or more episodes. The following are various aspects of the disease, including causes, symptoms, and treatment: 1. Causes: The disease is caused by Pseudomonas parasiticus in the vagina. When the body is in a healthy state, Pseudomonas does not invade the tissues and inflammatory reactions occur. However, when the immune function of the body or vagina decreases, pseudomonal yeast will “attack the body” and invade the surrounding vaginal tissues, causing symptoms. After pregnancy, the immunity of the body decreases and hormone levels change, which in turn changes the acid-base environment of the vaginal flora, leading to the proliferation of pseudomonal yeast, which invades the tissues and causes inflammatory reactions, especially the highest incidence in the first trimester. 2. Some patients have a burning sensation in the vulva and increased vaginal discharge, which is white thick curd-like, bean curd-like or watery thin leucorrhea. If the disease is not treated in time during pregnancy, chorioamnionitis, amniotic fluid infection, premature rupture of membranes and preterm delivery may occur, which can seriously affect the health of the fetus and the pregnant woman; 3. Treatment: After the diagnosis of mycosis fungoides during pregnancy, topical medication, such as clotrimazole, can be used to effectively inhibit the value of the mold and relieve clinical symptoms. For stubborn mycosis vaginitis, oral or intravenous medication is needed after delivery. 4. prognosis: generally, scientific and standardized treatment under the guidance of a doctor can achieve better results and can be cured. 5. precautions: during treatment, pregnant women should pay attention to keep their vulva clean, change their underwear regularly, preferably with loose cotton material, avoid bathing or sitting in a bath, choose shower, and avoid sexual intercourse. Avoid sexual life.