1, cervical degenerative changes: with the development of different stages of age, the cervical spine and intervertebral discs can undergo different changes, and while degenerative changes occur in the cervical vertebral body, the intervertebral discs also undergo corresponding changes. 2, trauma factors: on the basis of intervertebral disc degeneration, strenuous activity or uncoordinated movement. 3, chronic strain: long-term poor labor posture, the intervertebral disc is subject to strain, extrusion or twisting from a variety of sources. 4, cold, humidity: especially on the basis of disc degeneration, affected by cold, humidity factors, can cause local muscle tension increase, muscle spasm, increase the pressure on the intervertebral disc, causing damage to the fibrous ring.