The most basic cause of this disease is degenerative changes in the lumbar intervertebral discs. Normal intervertebral discs are elastic and resilient, with a strong resistance to pressure, and can bear a pressure of 450 kilograms without damage. However, after the age of 20, the intervertebral disc begins to degenerate gradually, the water content of the nucleus pulposus gradually decreases, and the elasticity and load-resistant ability of the intervertebral disc also decreases. In this case, due to various loads, the intervertebral disc is prone to produce fissures in the place of the greatest force, i.e., the posterior portion of the annulus fibrosus, from the inside to the outside, and based on this, certain factors may induce the rupture of the annulus fibrosus, resulting in the protrusion of the nucleus pulposus or the prolapse of the nucleus pulposus tissue. The more common triggering factors are: 1, increased abdominal pressure, such as violent coughing, constipation, defecation, etc. 2, lumbar posture is not appropriate, when the lumbar region is in the position of flexion, such as suddenly rotate the medulla protruding. 3, sudden weight bearing, in the absence of adequate preparation, sudden increase in the lumbar load, easy to cause herniation of the nucleus pulposus. 4, lumbar trauma, acute trauma can affect the fibrous ring, cartilage plate and other structures, and promote the degeneration of the herniated nucleus pulposus. 5, occupational factors, such as car drivers in a long-term sitting position and bumpy state, easy to induce disc herniation.