The main reason for cervical instability is that there is intervertebral disc tissue between the vertebrae, and as we age, the height changes, and the structure between the vertebrae and the vertebrae is not the normal structure of the original youth, and it is possible that the change in vertebral height causes the vertebrae and the vertebrae to move from one position to another. The human body has the function of self-correction, through the surrounding structures such as ligaments, muscles, all aspects of strengthening to eliminate the instability. There are two types of ligament and muscle strengthening: compensated by proper exercise and not adequately compensated. Ligaments that move too much in the active zone can thicken and cause symptoms by compressing the tissues inside the spinal canal. The platform below the vertebral instability then needs to become larger to make it more stable, and the problem of osteophytes and bone spurs can occur. If the osteophytes and bone spurs do not press on the nerves, they will not cause symptoms, but if they do, they will cause symptoms, such as numbness in the hands, pain in the hands, unstable walking, and dizziness.