Amazing statistics! Our survey found about 56% of mothers with low back pain and a high incidence of cesarean delivery. The Department of Orthopedic Injuries of Guangxi University of Traditional Chinese Medicine Expert Building conducted a follow-up survey on 200 mothers and found that the incidence of low back pain in these mothers was 39.6%. What are the manifestations of postpartum low back pain? Patients with postpartum low back pain mainly present with pain in the lower back or buttocks, with increased pain from turning over, walking, sitting, turning and lameness with crooked hips, and a few may present with lower abdominal pain and abdominal cramping. In addition, the patient appears that the anterior superior iliac spine and posterior superior iliac spine on both sides are not in the same plane, and the two lower limbs are not equal in length, that is, the so-called yin and yang legs, long and short legs. In the case of anterior rotation of the iliac bone: 1) the anterior superior iliac spine is shifted downward; 2) the posterior superior iliac spine is shifted upward; 3) the relative length of the affected lower limb is lengthened; 4) the parasacral groove becomes shallow and painful; 5) the level of the iliac crest decreases; 6) the distance between the posterior superior iliac spine and the posterior median line widens. In the acute stage, patients may have positive pelvic separation test and squeeze test. Positive “4” sign, pressure pain at the sacroiliac joint, deep pressure pain at the pubic symphysis, and buckling pain. X-ray or 3D CT reconstruction can clarify the diagnosis: taking a pelvic plain film, in addition to the relevant signs on the X-ray, it can also show the affected side of the pubic bone shifted downward and backward during anterior iliac rotation, and the closed hole longitudinal diameter is highly shortened.