1, lumbar degenerative disc changes Under normal circumstances, the intervertebral discs are often subjected to weight compression, coupled with the lumbar and often flexion, extension and other activities, more likely to cause greater extrusion and wear and tear of the discs, especially the lower lumbar discs, resulting in a series of degenerative changes. 2, the role of external forces Some people in daily life and work, there are often long-term lumbar force improper, excessive force, posture or position of the incorrect and so on. For example, loading and unloading staff long-term stooping to lift heavy objects, drivers in a long-term sitting position and upside-down state. These long-term repeated external forces caused by minor injuries. The cumulative effect on the intervertebral disc, aggravating the degree of degeneration. 3, the weakness of the intervertebral disc’s own anatomical factors ① The intervertebral disc gradually lacks blood circulation after adulthood. Repair ability is also poor, especially after the above degeneration, the repair ability is more impotent. ② The fibrous annulus of the posterior and lateral intervertebral discs is relatively weak, and the posterior longitudinal ligament in the lumbar 5, sacral 1 plane, the width of a significant reduction in the strengthening of the fibrous annulus is obviously weakened. 4, predisposing factors ① sudden weight bearing or flash waist: sudden increase in lumbar load, especially rapid bending, lateral flexion or rotation, is the main reason for the formation of fibrous ring rupture. ② lumbar trauma: when the violence is strong and does not cause fracture dislocation, it is possible to make the degenerated nucleus pulposus protrude. In addition, lumbar puncture examination or lumbar anesthesia may also produce disc herniation. Improper posture: In daily life and certain work such as getting up, standing up, etc., if the waist is in a flexed position and suddenly given an additional rotational movement, it is easy to induce herniation of the nucleus pulposus. Increased abdominal pressure: abdominal pressure has a certain relationship with the herniation of push discs, and sometimes the herniation of medulla oblongata can occur even when coughing, sneezing, constipation, or holding the breath with force. ⑤ Cold and humidity: cold or humidity can cause small blood vessel contraction and muscle spasm, which increases the pressure of the interferential disc and may also cause the degenerated interferential disc to rupture.