Pregnancy should be a joyous event, but with pregnancy comes a host of gynecological problems, especially the tendency to develop mycotic infections, which can recur and possibly last throughout the pregnancy. We not only ask, why is this a problem? After pregnancy, the vaginal environment changes due to changes in the hormonal level of the female body and the local resistance is low, which can easily cause infections, most often mycosis fungoides. This is due to the fact that Lactobacillus, Corynebacterium, estrogen and vaginal pH play an important role in maintaining the vaginal microecological balance. In pregnant women, elevated estrogen levels can lead to high glycogen content in the epithelial cells of the vaginal mucosa. The pH of mycobacteria is low, and with low immunity during pregnancy, it is very suitable for mycobacteria to reproduce, making it easy for mycotic vaginitis to occur. Once the mycotic vaginitis is contracted during pregnancy, it should be treated promptly by a doctor. The following principles should be followed during treatment: a. Take vaginal secretions for pathogenic examination, usually a smear test is sufficient for diagnosis, and then culture if necessary. b. Avoid sexual intercourse during treatment. Avoid sexual intercourse during treatment to avoid cross-infection. Topical vaginal medication should be chosen during pregnancy, and drugs that may affect the fetus should be prohibited in the first three months of pregnancy. Fourth, the treatment of local drugs such as mycobacterium, miconazole and clotrimazole, the course of treatment for 14 days. Mycoplasma pregnancy is graded as B. Topical imidazole drugs may be more effective than mycoplasma in treating vaginal candida during pregnancy. It can usually be cured before delivery. It is possible that the fetus may be infected with a small amount of Candida during delivery through the birth canal, but the doctor will treat the newborn in time and this is not a big problem. If the vaginitis is cured by the time of delivery, it will not affect the delivery.