The underlying cause of disc herniation is disc degeneration. Disc degeneration can be a physiologic process or can be caused by a variety of factors. The predisposing factors for disc herniation have not been clearly established. Age, gender, height, weight, physical fitness, history of trauma, occupation, smoking, body impact caused by driving a motor vehicle, and genetics may all be predisposing factors. 1, spinal deformity or change in spinal physiological curvature: spinal deformities such as symmetrical or asymmetrical migrating vertebrae, scoliosis or deformed lumbar vertebrae are predisposing factors for lumbar disc herniation. Changes in the physiological curvature of the spine predispose to disc degeneration. In addition, there is unilateral sacralization of the lumbar spine, when the occurrence of disc herniation can often be multiple herniation. 2, overload: engage in heavy physical labor and weightlifting often due to overload caused by early degeneration of the intervertebral disc. Long-term bending work such as coal miners or construction workers, need to often bend down to lift heavy objects, will make the waist overload. If long-term in such a large intervertebral disc pressure, that is easy in the early rupture of the annulus fibrosus. 3, lumbar puncture lumbar puncture: as early as 1935, it was reported that lumbar puncture was followed by the discovery of intervertebral space stenosis. Some cases were reported after lumbar puncture or lumbar anesthesia, and intervertebral stenosis occurred after lumbar puncture. Most of these cases were in adolescents and even 4-year-old children. Within days of the lumbar puncture, the patient had severe back pain and muscle straightening in the spine, and a series of radiographs showed a relatively rapid narrowing of the intervertebral space. However, in recent years, since the development of discography and percutaneous lumbar discectomy, most scholars believe that the puncture needle entering the nucleus pulposus through the fibrous ring does not lead to secondary herniation of the nucleus pulposus, especially when the puncture needle is thin and when the puncture is done from the collateral approach. 4. History of trauma: Acute injuries such as lumbar back sprains or twisting injuries do not cause lumbar disc herniation. Clinically severe spinal fractures with vertebral compression of 1/3 to 1/2 or more rarely result in rupture of the intervertebral disc annulus fibrosus, causing the disc to protrude into the spinal canal. However, the disc cartilage end plate can be ruptured, allowing the nucleus pulposus to protrude into the vertebral body. 5, long-term shock: car and tractor drivers in the driving process, long-term sitting and bumpy state, the lumbar intervertebral disc under greater pressure. Long-term repeated disc pressure increase can accelerate disc degeneration or herniation. 6, age: middle-aged people have the highest incidence of lumbar disc herniation. Among 209 cases of lumbar disc herniation, 64.46% were between 20 and 40 years old, and 34.92% were over 40 years old. And in the statistical analysis of 2504 procedures collected for lumbar disc herniation, their mean age was 40.8 years. It indicates that age is an important factor leading to disc degeneration. 7. Height: Those who exceed the average height of normal men and women and those who have a large lumbar spine index have a high incidence of lumbar disc herniation.