The body is not the same as the original after the lumbar spine is removed from the steel nails, patients may experience lumbar stiffness, chronic pain in the lumbar region, accelerated degeneration of the lumbar spine and other symptoms. 1. Lumbar stiffness: after the lumbar spine is removed, the lumbar muscles are still tight, the muscles will become stiff, and the range of motion of the lumbar spine will be limited, resulting in reduced flexibility of the lumbar spine, which may be due to the fusion of local implants, surgical trauma and other reasons. 2. Chronic lumbar pain: after taking steel nails in the lumbar spine, due to the long-term strain of local muscles, resulting in changes in the curvature of the lumbar spine, leading to ligamentous tension, patients often experience localized fasciitis, which manifests itself as chronic lumbar pain, which does not have a serious impact on daily life, but affects the work and sports. 3. Accelerated degeneration of lumbar vertebrae: after taking steel nails in lumbar vertebrae, due to the fusion between vertebrae, resulting in increased stress on small spinal joints, making it easy to develop degenerative arthritis. In addition, the stress of the segment that cannot be completely fused will also increase, causing degeneration of the annulus fibrosus and nucleus pulposus, which in turn causes lumbar disc herniation. This is why the aging of the spine is accelerated after the removal of steel nails in the lumbar spine. After the lumbar spine surgery to remove the steel nails, to do a good job of lumbar back muscle training, such as small swallow fly, five-point support, can improve the stability of the lumbar spine, reduce the burden on the lumbar spine, so that the lumbar spine to return to the original level.