Yellowish and smelly panties of pregnant women are firstly considered to be a sign of vaginitis. If you do not pay attention to hygiene and washing during pregnancy, it can easily lead to vaginitis. This is because after pregnancy, there is an increase in leukorrhea due to the influence of hormonal secretion in the body. The leukorrhea often accumulates at the vulva and if not washed in time, it can lead to bacterial infections and in severe cases, retrograde infections, which can cause fetal infections in the uterine cavity, leading to fetal abortion or fetal growth retardation, etc. Therefore, when vaginitis is detected, it should be treated as soon as possible. It is also important to pay attention to hygiene and washing, and vaginitis should be treated with special medications for intravaginal use, and oral medication is not recommended during pregnancy.