There are many symptoms of cervical instability, the common ones are dizziness, nerve compression symptoms and other symptoms. 1. Dizziness: When the cervical spine moves, it stimulates the sympathetic nerves and causes arterial spasm, which affects the blood supply of the arteries and leads to dizziness. 2. Nerve compression symptoms: compression of peripheral tissues and nerves may cause nerve irritation symptoms such as neck discomfort, stiffness, difficulty in movement and pain. If accompanied by herniated intervertebral discs, bone spur hyperplasia, compression of the surrounding spinal cord, nerve roots, neck, shoulder and arm pain, numbness, weakness, and even accompanied by the lower extremities of the cotton feeling symptoms. 3. Other symptoms: after activity, neck, shoulder, back and other parts of the soreness and pain symptoms. Cervical spine instability may have other symptoms, if there is discomfort, should go to the hospital in time, under the guidance of the doctor standardized treatment.