Lumbar relaxation pain, may be related to the following reasons: 1, there may be lumbar muscle strain, often seen in patients with long-term lumbar muscle strain, followed by lumbar muscle atrophy and obvious weakness. When the patient keeps the waist relaxed, it will be due to the lack of strength of the lumbar muscles, which in turn produces the lumbar muscles to be overstretched and unable to maintain the patient’s position, which will induce the patient to appear obvious pain. A typical example is the patient in the relaxation of lumbar bowing sitting up, that is, the waist backward convex, will induce the lumbar region to produce obvious pain. 2, may be the existence of lumbar vertebral body slippage, often seen in the patient’s lumbar spine vertebral body slippage is very serious. In the usual lumbar muscles to maintain tension, to maintain the stability of the spine, but once the lumbar muscles to produce relaxation, between the vertebrae will produce a relatively large activity, which in turn stimulate the relevant nerve roots to produce pain. Patients in the day after work, lying in bed when lying down to rest, may appear this situation. 3, may also be due to the lumbar spine of degenerative changes caused. For example, in the lumbar spine osteophytes, ligament hypertrophy, calcification, disc herniation and other diseases, may be in the lumbar relaxation when a corresponding pain.