Vaginitis in pregnant women may be caused by mycobacterial infection, bacterial infection and trichomonas infection, mainly manifested as vulvar itching and increased leucorrhea with fishy odor. If you find symptoms of vaginitis during pregnancy, you need to consult a doctor, have your vaginal discharge examined, and then take symptomatic treatment according to the infecting bacteria. 1. mycobacterial infection: mycobacterial vaginitis is mainly caused by the increase of female sex hormones during pregnancy, which leads to vaginal congestion, vulvar moistening, increased glycogen, and more lactic acid produced by lactobacillus, resulting in a decrease of vaginal pH and easy reproduction of mycobacteria in the vagina. 2. 2. Bacterial infection: Pregnancy causes changes in the vaginal environment, and if pregnant women do not pay attention to pubic hygiene, it leads to the growth of vaginal bacteria and causes bacterial vaginosis. 3. Trichomonas infection: Trichomonas vaginalis is mainly caused by Trichomonas vaginalis infection, which leads to increased vaginal discharge, leucorrhea odor and vulvar itching, and also increases preterm labor, amniotic cavity infection and premature rupture of fetal membranes. If vaginitis occurs during pregnancy, it needs to be treated promptly to prevent preterm labor, amniotic cavity infection, premature rupture of fetal membranes, etc. You can use medicines or lotions that have less effect on the fetus under the guidance of a professional doctor, but unauthorized use of medicines is prohibited. Pregnant women with vaginitis should try to choose cotton clothes and pants that are easy to breathe, change underwear regularly, and forbid bathing. You should also pay attention to a light diet and avoid spicy and stimulating food.