The pain in the lower part of the body in the late stage of pregnancy is usually caused by the fetal head entering the pelvis, ligament pulling, vulvar varicose veins, vaginitis and other reasons. 1. Fetal head into the pelvis: in the late stage of pregnancy, the fetal head basically enters into the pelvis, the fetal head and uterus enlargement on the pubic bone and pelvic floor tissues of the pressure is more obvious, in the pregnant women walking and sitting will cause pain in the lower part of the body. 2. Ligament pulling: pregnant women in the late stage of pregnancy due to the growing uterus pulling the ligaments on both sides, causing pain in the lower part of the body. 3. Vulvar varicose veins: due to the pre-disclosure of the fetus and the increasing uterus pressing on the pelvic floor tissues, the reflux of the vulvar veins is blocked and the local distortion and dilatation, which will result in swelling and pain. 4. Vaginitis: If combined with the combination of vaginitis, it will cause vulvar itching due to increased secretion stimulation. Gynecological examination shows that the vaginal mucosa is red and swollen or accompanied by ulcerated surfaces, and pain will occur. Late pregnancy below the pain symptoms are mild can be observed, if the symptoms are serious, should be timely to the hospital obstetrics and gynecology consultation, under the guidance of the doctor to clarify the cause of standardized treatment.