Sacral fracture has an effect on lumbar, which can cause acute lumbar sprain, lumbar soft tissue injury, nerve compression symptoms. 1. Acute lumbar sprain: Sacral fracture is mostly caused by external force such as fall and impact, which may injure the lumbar region and lead to acute lumbar sprain or lumbar disc herniation, which may cause lumbar pain, mostly accompanied by lumbar activity limitation. 2. Lumbar soft tissue injury: Sacral fracture will cause congestion and edema of the surrounding soft tissues and pain, if not treated timely and effectively, the scope of soft tissue injury may expand, resulting in lumbar pain. 3. Symptoms of nerve compression: Sacral fracture can lead to nerve irritation or extrusion in the vertebral canal, causing radiating pain, which may result in lumbar pain and discomfort. If sacral fracture is diagnosed, early and standardized treatment is recommended to reduce the adverse effects of the disease.