Postpartum sciatic nerve pain is related to postpartum hormonal changes and ligamentous laxity, etc. Sciatic pain is also related to the trauma and fatigue caused by the birth itself, which can cause the accumulation of inflammatory substances to aggravate the pain. Pregnancy and childbirth will cause certain pressure on the lumbar spine, and the increase in weight will stimulate the intervertebral discs causing disc herniation or aggravate the original lumbar spine pathology, thus stimulating the sciatic nerve and the nerve roots in the lumbar region, causing pain and radiating pain to the lower limbs, buttocks, lumbar region and thighs, including pain in the sciatic bone. After giving birth, pay attention to rest, holding the child, exertion, cold will have sciatic pain, which is not very suitable for the use of drugs, can be relieved by bed rest, physical therapy, hot compresses and other methods.