Early pregnancy, due to endocrine influence, will lead to an increase in hormone secretion in the body, which will loosen the joint ligaments and manifest pain in the buttocks. Generally, due to the laxity of the joint ligaments in the lumbar region and the weakened stability, it will easily lead to muscle ligament strains or the occurrence of such phenomena as lumbar disc herniation and sciatic nerve pain, or cause pathological changes such as edema and congestion, and painful sensations will occur. As the fetus and uterus increase in size, they will also compress the sacral nerve in the lumbar back, which will cause a strong tingling sensation, which will lead to edema during pregnancy, water and sodium retention, and varicose veins in the lower extremities, and the symptoms will gradually recover after the birth of the child.