Neck tilting to one side may be related to pillow fall, neck tilt, cervical spine pathology and cervical spine trauma. Sleeping at night when the pillow height is not appropriate or cold, may cause pillow fall, one side of the muscle spasm, the neck will appear to one side of the phenomenon of tilt. After massage, hot compresses and other treatments, the neck will be able to return to normal after the spasm of the falling pillow muscle is relieved. The tilt neck is divided into congenital tilt neck and acquired tilt neck, caused by unilateral contracture of the sternocleidomastoid muscle, contracture will appear after the neck tilted to the side of the symptoms. Cervical spine lesions, such as ankylosing spondylitis, can also cause the neck to tilt to one side. Trauma to the neck, such as muscle strain or fracture, may force the neck to tilt to one side to relieve pain symptoms due to painful stimuli. Some people, such as students, also develop the habit of tilting their necks to one side because their seats are located on one side of the blackboard for a long time, or because some special jobs require them to tilt their heads to one side for a long time. If your neck is tilted to one side, it is recommended that you go to the hospital in time for a complete examination and regular treatment.