Yellow discharge in women during pregnancy may be a manifestation of vaginitis due to a dysbiosis of the vaginal flora environment or vaginal inflammation caused by infection with pathogenic bacteria, such as common mycosis fungoides, bacterial vaginitis, trichomoniasis, etc. In addition, for those who had chronic cervicitis before pregnancy, it should be considered as a result of cervicitis in pregnancy. Therefore, if you have yellow discharge during pregnancy, you need to go to the hospital for a routine gynecological internal examination of the white belt to clarify the presence of vaginal inflammation and cervical inflammation. If the test is simply a poor cleanliness of the leukorrhea, you can consider using herbal lotions that have no significant adverse effects on pregnant women to wash the vulva or take a sitz bath. However, if there are pathogenic bacteria, such as mold, trichomonas, aerobic bacteria, anaerobic bacteria, etc., along with poor cleanliness of the leukorrhea, then it is necessary to administer topical vaginal medication for the different pathogens that have less effect on the pregnant woman to avoid adverse effects on progesterone and the fetus.