The cause of pain in the left side of the cervical spine is usually fourfold; first, due to strain and cold in the oblique muscles of the left side of the cervical spine, due to inappropriate pillow height during sleep at night, resulting in excessive fatigue of the local oblique muscles to form strain, especially with cold, local inflammation, lactic acid and other metabolic products on the peripheral nerve stimulation, painful symptoms will occur. Second, due to abnormalities in the skin of the left side of the cervical spine, such as folliculitis and sebaceous cysts, there may be painful symptoms due to the stimulation of peripheral nerves. Third, due to the osteophytes in the left side of the cervical spine, the surrounding muscles and other soft tissues will be stimulated and painful symptoms will easily appear. Fourth, due to the swelling of lymph nodes in the left side of the cervical spine, such as infection and other lesions, a long time will also cause swelling of lymph nodes and pain.