This is because cervical spondylosis originates from cervical disc degeneration, cervical disc nucleus pulposus is about 80% water, its elasticity and tension with water content is closely related to the water content, its water content decreases with age, after middle age due to the gradual dehydration of the intervertebral disc nucleus pulposus, its elasticity and tension decreases, easy to be compressed, so that the fiber ring outward expansion of degeneration. In addition, the distribution of intervertebral disc blood vessels also gradually decreases with age, and in adulthood, except for the peripheral part of the annulus fibrosus, there are no blood vessels in the disc, and the nutrition of the disc mainly depends on the blood of the blood vessels in the vertebral body diffused through the hyaline cartilage plate, so it is easy to degeneration. Due to the degeneration of the intervertebral disc, the intervertebral space is narrowed and relaxed, the stability of the intervertebral joint is weakened, the wear and tear of the joint is aggravated, and the osteophytes are increased. In addition, long-term chronic strain can also cause different degrees of injury to the cervical intervertebral discs, ligaments and joint capsule, so that the stability of the cervical spine decreases, hyperplasia occurs, and compression of nerves, blood vessels and spinal cord causes clinical symptoms.