What is the cause of the pain in the lower part of the body is usually vaginal pain, there are more reasons, such as uterine pressure, contractions in labor, vulvar inflammation, etc., to clarify the specific cause of treatment. 1, uterine pressure: due to the increase of the uterus on the pelvic organs of compression, may lead to obstruction of blood flow, vaginal blood supply is insufficient, there will be pain, this situation should pay more attention to rest, avoid doing some home 2.Production performance: if there is regular pain in the lower abdomen or falling pain in the lumbosacral area in late pregnancy, it is usually a contraction, suggesting that labor is about to start, so you need to go to the hospital in time for delivery; 3.Disease causes: if there is pain in the vagina, it may be vaginitis, pathological leucorrhea will stimulate the vaginal mucosa and cause redness and pain, usually you need to go to the hospital for examination, or it may be trauma and other problems. 4, other: a few people may have pain below because the fetus presses on the pubic bone leading to the separation of the pubic symphysis, which will also occur, and need to be identified clearly. Pregnant women who are nearing their due date and have pain below can consult a professional obstetrician and gynecologist, and if it is an aura of labor, they should be admitted to the hospital in time for delivery.