(1) Trauma: Acute injuries such as lumbar sprains do not directly cause lumbar disc herniation. However, in the case of losing the protection of lumbar back muscles, it is very easy to cause disc herniation. (2) Excessive weight bearing: engaging in heavy manual labor and weight lifting sports often cause early degeneration of intervertebral discs due to excessive loading. When the spine loaded 100Kg, the normal intervertebral disc space narrowed 1.0mm, to the lateral expansion of 0.5mm, and when the disc degeneration, negative the same weight, the intervertebral space narrowed 1.5 ~ 2mm, to the lateral expansion of 1mm. (3) long-term vibration: automobile and tractor drivers in the work, long-term in the sitting and upside down state, the lumbar discs to withstand the pressure is greater. It is determined that when the driver stepped on the clutch, its intervertebral disc pressure increased by about double. So long-term repeated disc pressure increase, can accelerate the degeneration or herniation of the intervertebral disc. (4) the influence of bad position: people in the completion of a variety of work, the need to constantly change a variety of positions, including sitting, standing, lying down and difficult to avoid a variety of non-physiological posture, which requires that the spine and the intervertebral discs should be at any time to withstand a variety of different external pressure. If the spine and intervertebral discs are subjected to different external pressures at any time. If the spine exceeds its ability to withstand or fails to adapt to the conduction of external forces, it may suffer from trauma or cumulative injury. For example, the posture when lifting heavy objects is very important, and poor posture often induces the occurrence of this disease. (5) Spinal deformity: congenital and secondary spinal deformity patients, due to the intervertebral discs are not only unequal width, and there is often twisted, which makes the pressure on the annulus fibrosus is not the same, and it is easy to accelerate the degradation of the intervertebral discs.