There are several reasons for vulvar swelling in the 7th month of pregnancy: i. As the weeks of pregnancy increase, the fetus gradually grows and the uterus rotates right to compress the inferior vena cava. These factors can lead to poor venous reflux, and the vulva is located in a relatively low position in the body, leading to edema. Second, vulvar varicose veins, if pregnant women have poor venous valve function, after pregnancy, due to poor venous return, may cause vulvar varicose veins. Third, vulvovaginitis stimulation, after pregnancy, due to the increase of hormone level, the vaginal glands secrete vigorously, if you do not pay attention to hygiene, it is easy to occur vulvovaginitis, resulting in vulvar swelling. Fourth, vestibular gland cysts or abscesses can also cause vulvar swelling. When vulvar edema occurs, it is recommended to see a doctor for proper diagnosis and treatment.