Lumbar spine straightening is a manifestation of lumbar degenerative changes. Originally, the normal physiological curvature of the lumbar spine is in a forward convex arc, but due to a series of pathological factors, it will lead to accelerated lumbar degenerative changes, when the lumbar spine becomes straight. In clinical practice, the common factors that cause lumbar degeneration are mainly the following: 1. There are adverse factors, such as patients with long-term sitting and standing, or poor sitting posture with a stooped back while sitting and standing. This will cause changes in the physiological curvature of the lumbar spine, and then straighten the lumbar spine. 2. This condition may be caused by bony lesions of the lumbar spine, such as the existence of compression fractures of the lumbar spine or osteophytes of the lumbar spine, which will cause changes in the physiological curvature of the lumbar spine. 3. This condition is caused by soft tissue lesions on both sides of the lumbar spine. If the patient has an acute lumbar sprain, lumbar muscle strain or ligamentous hypertrophy or calcification of the lumbar spine, it will lead to straightening of the lumbar spine. 4. At the onset of a severe lumbar disc herniation, it may also lead to a change in the physiological curvature of the lumbar spine, which then leads to straightening of the lumbar spine.