Compression of the cervical spine on the nerve is mainly seen in neurogenic cervical spondylosis and spinal cord cervical spondylosis. When the nerve root type cervical spondylosis compresses the nerve heel, it usually produces neck pain, numbness and radiating pain in the upper limbs and/or hands. Each nerve root innervates a different area and produces pain and numbness in different areas after compression. For the specific nerve roots that innervate which area, you can see the following figure: the orange C2-C8 represent the areas innervated by the cervical roots from cervical 2 to cervical 8 respectively, and the areas where the pain is produced are different when a herniated disc compresses different nerve roots. In the case of spinal cord cervical spondylosis, the degeneration of the cervical spine leads to compression of the spinal cord, and the patient will experience numbness, weakness, pain, and inflexibility in the upper and/or lower extremities. In the upper extremities, the numbness, weakness and inflexibility of the hands are mainly manifested, making it impossible to perform fine movements such as writing, using chopsticks and tying buttons. In the lower extremities, the main symptoms are weakness, difficulty in walking, and a feeling of stepping on cotton. Severe patients may have urinary and fecal dysfunction, and some patients may have reduced sexual function. Spinal cord cervical spondylosis is the most serious type of cervical spondylosis. Once the symptoms of appeal appear, it is recommended to consult a doctor as soon as possible for timely treatment to save the function of the spinal cord and avoid more serious complications.