Neck pain may be caused by pillow fall, cervical spondylosis, subacute thyroiditis and other reasons. 1. Falling pillow: Sleeping posture discomfort, improper pillow and other reasons lead to neck muscle spasm, or the neck by the wind and cold cold, resulting in turning the neck when the activities of the neck is limited, neck pain. 2. Cervical spondylosis: cervical spondylosis caused by deformation of the physiological curvature of the cervical vertebrae due to prolonged work at desk or playing with the cell phone with the head down may cause neck pain. 3. Subacute thyroiditis: Viral infections and other causes of subacute thyroiditis can also cause neck pain, which is aggravated by turning the neck and swallowing. If the neck pain is not relieved in time, you should go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment.