⑴ Degeneration of intervertebral disc: In normal condition, intervertebral disc is often pressed by body weight and outside force. At the same time, lumbar often flex and extend. Improper movement can often cause heavier press and abrasion to intervertebral disc, especially the force on lower lumber is heavier so that the intervertebral disc degenerated easily.

⑵ Outside force: Some people are unaware of physical activity. Meanwhile, they often overexert their waist or their postures are improper. For example, stevedores stoop down and lift heavy things, drivers sit in cab to be jolty for a long time. Long-term and repeat bump from outside force can cause a slight trauma to intervertebral disc . The outside forces exert on intervertebral disc year after year so that the degeneration of intervertebral disc accelerates.

⑶ Anatomic weakness of intervertebral disc itself:
① The blood circulation of intervertebral disc becomes insufficient after people grow up. So the renovating function of intervertebral disc is comparatively poor and even poorer after the degeneration stated above happens.
② The lateral fiber ring of intervertebral disc is comparatively weak. At same time, the width of posterior longitudinal ligament on L-5 and S-1 surface decreases significantly. As a result, the strengthen effect of posterior longitudinal ligament on fiber ring at this point weakened significantly.

⑷ Inducing Factors:
① Acute loading or lumbar sprain : Acute increment of lumbar loading, especially, sudden bending, lateral flexion or rotation are all main reasons for the rupture of fiber ring.
② Lumbar trauma: On the condition of a sudden force without fracture or dislocation, the possibility of marrow nuclear extrusion is bigger. In addition, lumbar disc protrusion can also happen after lumbar puncture or lumbar anesthesia.
③ Improper postures: During getting up, standing up, bending to pick up and sexual intercourse etc. in daily life and some work, when the waist is in flexing position, only a sudden extra rotating motion can induce marrow nuclear protrusion easily.
④ Increase of abdomen pressure: Acute cough, sneezing, astriction and making an effort to hold one's breath etc. which can increase abdomen pressure suddenly can also cause marrow nuclear herniation.
⑤ Catch a cold or affected with damp: Cold and dampness can cause small vessel constriction and muscle spasm so that the pressure on intervertebral disc increases or even make the degenerated intervertebral disc to rupture.

⑴ People should lie on the bed to have a rest during acute period and during the symptom outbreak, try to reduce the nerve roots stimulation from the shooter or the disc. The doss is better to be hard one. The tick keeps in the middle of thick and thin and in the middle of soft and hard. The height of the bed should be a little bit lower, such as the patients' feet can touch the ground when they just sit on the bed. Make sure your mattess's quality is good. You should choose the mattess that you don't feel denty when you lie on the bed. If using the real Tian Tan brand mattess, that will be fine because I am using that. And also patients should avoid Tui-Na on lumbar vertebra joints.

⑵ The patient should reduce any stimulations during the catabatic time. To avoid getting cold, humidity, tireness, bend to pick up things and trauma around waist area.

⑶ Try to avoid having sex for acute period.

⑷ Rubbing the waist by the two palms 500-1000 times everyday until you can feel your waist is being hot.

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