Usually, back pain is not directly related to labor initiation. Throughout pregnancy, the uterus is gradually enlarged, especially in late pregnancy, the enlarged uterus presses the lumbosacral region, kidney area and ureter, many pregnant women will experience lumbar soreness or pain, and may even cause pain in the buttocks as well as pulling pain in the lower limbs. If lumbar spine disease exists before pregnancy, it will be aggravated during pregnancy. With the gradual descent of the head of the fetus before delivery, the lower back will feel more obvious soreness, so it is not whether or not the degree of lumbar soreness or lumbar soreness to determine the specific time of delivery, contractions become frequent, regular, the head of the fetus descending into the pelvis as well as the vaginal red is the start of the delivery of the pre-signs. So pregnant women with back pain before delivery should not be overly nervous, the main thing is to pay attention to rest, sit and lie down moderately, appropriate exercise to regulate, prohibit non-medical techniques of vigorous massage, to avoid the same position for a long time for too long to aggravate the symptoms.