Core tip: Women should avoid standing for long periods of time after pregnancy, especially in the third trimester. Avoid wearing tight pants and shoes; do not go near heat sources or bathe in excessively hot water. It should be said that there are two reasons for this situation: vaginitis. Common vaginitis include bacterial vaginitis, trichomonas vaginitis, candida vaginitis, senile vaginitis, etc. 1. Bacterial vaginosis; leucorrhea is gray-white with a fishy smell, and there is burning and itching in the vagina. 2.