This condition of neck pain on the left side can be caused by cervical spondylosis. Cervical spondylosis, also known as cervical spine syndrome, is a very common disease. Cervical spondylosis is a disease based on degenerative lesions, such as long-term cervical spine strain, osteophytes, disc prolapse can cause neck dysfunction. Patients often experience neck pain, and some may also experience upper extremity weakness, numbness of the fingers, dizziness, nausea, vomiting, tachycardia, and other symptoms. Patients with the above symptoms need to go to the hospital to check the cervical spine MRI for a clear diagnosis. Patients suffering from cervical spondylosis should first pay attention to rest and avoid exertion. If the pain is more obvious, anti-inflammatory and analgesic drugs can be applied for treatment to relieve the symptoms of pain. In addition, it can be treated by acupuncture, tuina, massage and other physical therapy methods, and it is recommended to use medication under the guidance of a doctor.