Lumbar disc herniation is one of the most common orthopedic diseases, and people often ask: “Doctor, how did I get a lumbar disc herniation, I usually pay attention to protecting my back”, “Doctor, what is the cause of lumbar disc herniation”, etc. Such and such topics. What are the causes of lumbar disc herniation? The causes of lumbar disc herniation a. Common triggering factors ①Higher abdominal pressure, such as violent coughing, constipation when forceful defecation, etc. ②Inappropriate lumbar posture, when the waist is in a flexed position, such as sudden rotation is prone to induce nucleus pulposus herniation. ③Sudden weight-bearing, when not fully prepared, sudden increase in lumbar load, easy to cause nucleus pulposus protrusion. ④ Trauma to the lumbar region, acute trauma can affect the fibular ring, cartilage plate and other structures, which can lead to the protrusion of the degenerated nucleus pulposus. ⑤ Occupational factors, such as car drivers in a sitting position and bumpy state for a long time, easy to induce disc protrusion. Second, degenerative changes It is currently believed that the basic cause is the degenerative changes of the lumbar intervertebral disc. Degeneration is the objective law of birth, growth, decay and death of all living things, and because of the special physiological function of the lumbar spine, the degeneration of the lumbar intervertebral disc is earlier than other tissues and organs, and the progress is relatively fast. This process is a long-term, complex process. The so-called lumbar disc degenerative changes: that is, due to the compression of the disc by weight, coupled with the lumbar and often flexion, posterior extension and other activities, easy to cause extrusion and wear of the disc, especially the lower lumbar intervertebral disc, thus producing degenerative changes. Degenerative changes in the lumbar intervertebral disc is the basis for the occurrence of this disease. Third, other factors 1, the role of external forces: in daily life and work, some people tend to have long-term lumbar improper force, excessive force posture or incorrect body position, etc.. For example, long-term bending work of coal miners and construction workers need to often bend over to lift heavy objects. These long-term repeated external force caused by the injury of the intervertebral disc over time, aggravating the degree of degeneration. 2, the weakness of the disc’s own anatomical factors: (1) intervertebral disc in adults gradually lack of blood circulation. Repair ability is also poor, especially after the degeneration is generated, the repair ability is even weaker. (2) The posterior lateral fibrous ring of the disc is weaker, while the posterior longitudinal ligament is significantly reduced in width at the lumbar 5 and sacral 1 planes, and the strengthening effect on the fibrous ring is significantly weakened. (3) congenital abnormalities of the lumbosacral segment: deformities of the lumbosacral segment can increase the incidence, these abnormalities often cause unequal width of the vertebral space, and often cause more rotational strain on the synovial joints, so that the fibrous ring is subject to varying pressure, accelerating degeneration. 3, race, genetic factors: the incidence of people of color is lower; for example, the incidence of Indians and black Africans, etc. is significantly lower than other ethnic groups.