Cervical spine instability is caused by trauma, inflammation, degeneration and other factors that cause the cervical vertebral body joint surfaces to lose their normal alignment, resulting in a series of clinical symptoms. Cervical spine instability is mainly caused by trauma, inflammation, degeneration, or even cervical deformity or tumor and other factors, resulting in damage to the vertebral body ligaments, intervertebral discs and other tissues and structures, so that the cervical vertebral body articular surfaces lose the normal alignment relationship, causing a decrease in stability. It can be divided into upper cervical instability and lower cervical instability. Upper cervical instability is atlantoaxial instability, instability can occur atlantoaxial forward, backward or rotational dislocation, resulting in spinal cord compression and injury, and in severe cases, can cause quadriplegia or even respiratory muscle paralysis and death. Lower cervical spine instability is more common, and may manifest symptoms such as neck and shoulder or upper limb pain, limb numbness, or loss of muscle strength. For cervical spine instability, if the symptoms gradually worsen, active treatment is needed.