The lumbar intervertebral disc will undergo degenerative changes with age, and the degenerative nature of the disc will gradually worsen. The main change is that the nucleus pulposus will become dehydrated, and after the condition of dehydration occurs, the elasticity and tension of the intervertebral disc will have abnormal performance, and gradually, the symptoms of lumbar disc herniation will slowly appear, and this is one of the causes of the occurrence of the disc. The reason why the disease occurs in young people and manual workers is inseparably related to everyone’s activities and work. First, the weakness of the disc’s own anatomical factors: after a certain age, the local blood supply to the disc will be poor, the intervertebral disc nutrition is mainly dependent on the vertebral body vascular and tissue fluid supply through osmosis, degenerative changes will occur relatively early than other tissues of the human body, but also heavy, the repair process after the injury is slow, the structure is easier to appear weak characteristics. In such a situation, in the intervertebral keyboard on the basis of the pressure rise, the degenerative nucleus pulposus may pass through the relatively weak fiber ring, resulting in the nucleus pulposus of the disc herniation symptoms. Second, trauma: about 30% of patients have a history of trauma of varying degrees, more common is bending over to carry heavy objects, because of the incorrect posture, increasing the load on the waist, or a long period of bending over and suddenly straighten the waist, buttocks on the ground, etc., the occurrence of these traumatic injuries is likely to cause the nucleus pulposus of the intervertebral disc instant pressure exceeded the maximum stress that the annulus fibrosus can withstand, thus The nucleus pulposus protrudes from the ruptured area, resulting in the occurrence of lumbar disc herniation. Third, degenerative changes in the lumbar intervertebral disc: long-term chronic strain is the main cause of degenerative changes in the lumbar intervertebral disc. Long-term repeated external forces and minor injuries caused by incorrect posture and improper activity posture at work, over time, the lumbar intervertebral disc will degenerate and the speed of degeneration will accelerate. After the degenerative change of the intervertebral disc, its original elasticity and tension will decrease, thinning, brittle, dehydration of the nucleus pulposus and other small-scale pathological changes, on this basis, if the collection of more serious trauma or uneven pressure, so it will be easy to occur the phenomenon of rupture of the annulus fibrosus nucleus pulposus protrusion.