The pain in the pubic area of pregnant women may be caused by the compression of the enlarged uterus, or it may be caused by bacterial vaginitis, vulvovaginal pseudomycosis, and so on. 1. Enlargement of the uterus compression: during pregnancy, due to the increasing size of the uterus, if the pressure on the inferior vena cava, resulting in blood reflux obstruction, can cause perineal swelling, pain in the phenomenon. 2. Bacterial vaginitis: a mixed infection caused by the imbalance of normal flora in the vagina. The main manifestation is the increase of vaginal secretion, which is thin vaginal secretion with fishy odor, accompanied by vulvar itching and burning sensation and other symptoms, which can lead to vaginal pain in pregnant women. 3. Vulvovaginal pseudomycosis: caused by fungal infections, mainly manifested as vulvovaginal itching, increased vaginal discharge, white thick, tofu slag-like vaginal secretions, part of the burning pain in the vulva, pain during sexual intercourse and pain during urination, which can also lead to vaginal pain in pregnant women. There are many other causes of vaginal pain in pregnant women, which should be taken seriously, and timely consultation should be made to identify the cause of the disease and further treatment or therapy as prescribed by the doctor.