In severe cases of cervical radiculopathy, the pain is paroxysmal and severe, with distribution along the nerve roots and electric shock-like pain in the lateral forearm and fingers. There are eight pairs of cervical spinal nerves, which are innervated in different areas, so when they are involved, the distribution of symptoms varies greatly depending on the area of involvement. In clinical practice, the cervical 5-8 spinal nerve roots are more frequently involved. Protrusion or prolapse of the nucleus pulposus, osteophytes or traumatic arthritis of the posterior tuberosity, formation of bone spurs in the hook vertebral joints, and loosening and displacement of the three adjacent joints (intervertebral, hook vertebral, and posterior tuberosity joints) can cause irritation and compression of the spinal nerve roots. In addition, narrowing of the root canal, adhesive arachnoiditis in the root cuff, and inflammation and tumors in the surrounding area may cause symptoms similar to this disease. Since the pathogenesis of this type of disease is complex, the symptoms and clinical signs vary depending on the location and degree of involvement of the optic chiropractic root. If the anterior root is predominantly compressed, muscle strength changes (including decreased muscle tone and muscle atrophy) are more obvious; if the posterior root is predominantly compressed, the symptoms of sensory impairment are more severe. However, in clinical practice, the two mostly coexist, mainly because, in the narrow root canal, a variety of tissues are densely packed together, and it is difficult for everyone to have room for retraction. Therefore, when the anterior side of the spinal nerve root is compressed, the posterior side of the root canal is also compressed at the same time. The mechanism for this is due not only to the hedging effect of the force, but also to the local vascular stasis and congestion under pressure, both of which are affected by each other. Therefore, sensory and motor dysfunctions are mostly present simultaneously. However, the sensory nerve fibers are more sensitive and therefore the symptoms of sensory abnormalities are manifested earlier.