Many first-time mothers or mothers giving birth to their second child will experience post-delivery low back pain after experiencing intraspinal anesthesia. According to clinical observation, the incidence of this post-anesthesia low back pain is higher after cesarean section, and the reasons for this are analyzed as follows. 1, physiological ligament relaxation The hormone level of pregnant women’s body changes greatly after pregnancy, in addition to estrogen and progesterone, serum relaxin also increases significantly, making the pelvic ligaments relaxed to facilitate the smooth delivery of the fetus. In addition, the enlarged uterus compresses the nerves, blood vessels and muscles of the pelvic floor, which can also cause lumbosacral pain. 2.Physiological bending changes Pregnant women’s abdominal expansion, so that the body’s center of gravity tilted forward and down, in order to maintain body balance, there is lumbar back muscle tension; after the birth, especially after the cesarean delivery strict pillow lying, changing the physiological curvature of the spine, increasing the tension of the lumbar back muscles; prematurely wear high heels after delivery, so that the body’s center of gravity shifted forward, in addition to causing foot pain, can also reflexively cause lumbar pain, in addition Inappropriate feeding posture, so that the muscles of the low back are always in a state of non-relaxation, the formation of chronic strain injury will also appear lumbago. 3.Posterior position of uterus and prolapse When a woman rests in bed, the ligaments that maintain the uterus in forward and flexed position relax, and the uterus is not completely reset soon, which can lead to posterior position of the uterus and stimulate the lumbosacral region and cause lumbago pain; after delivery, if you do not pay attention to rest, overwork, weight bearing, standing and sitting for a long time, as well as girding too tightly, which leads to prolapse of the uterus, lumbago can also occur. 4, physiological calcium deficiency After pregnancy, the ordinary diet can no longer meet the demand for calcium of the mother and the fetus, and breastfeeding after delivery will cause a large loss of calcium in the mother’s body, and calcium deficiency will also cause back pain. In addition, for diseases with back pain symptoms, such as ankylosing spondylitis, sacroiliac arthritis, lumbar disc herniation and lumbar strain, both cesarean section and normal delivery may aggravate the original back pain symptoms. Then, for back pain after childbirth, the emphasis is on prevention, pay attention to calcium supplementation during pregnancy, do not stand for a long time, sit for a long time, lie still for a long time, wear high heels, to combine work and rest, lying down especially after childbirth can be padded with a thin pillow behind the neck and waist to maintain normal spinal curvature.