The cause of severe pain in the lumbar spine may be acute lumbar sprain, lumbar vertebral compression fracture, lumbar muscle strain and so on. 1. Acute lumbar sprain: soft tissues such as lumbar muscles, fascia or ligaments are acutely injured due to excessive pulling by external forces, triggering severe pain in the lumbar region, which can be accompanied by lumbar muscle spasms, stiffness, and even activity limitation. 2. Lumbar compression fracture: after the lumbar spine is stimulated by slight or serious violence, it can lead to vertebral body injury, the height of the vertebral body is reduced, and the clinical symptoms are mainly lumbar pain, accompanied by lumbar activity limitation, skin bruising and other manifestations. 3. Lumbar muscle strain: lumbar muscle strain is a chronic injury inflammation of the lumbar muscles and their attachment points of fascia or periosteum, the symptoms are mainly lumbar pain, and the pain can be aggravated after exertion. Only lumbar spine pain is a symptom can not be clear cause, need to go to the hospital in time to diagnose, and then targeted treatment, so as not to delay the condition.