Neck muscle pain is commonly caused by the following: first, neck muscle strain or cervical spondylosis: both can lead to neck muscle tension, stiffness and clinical symptoms of neck pain, the pain symptoms will be reduced when pressing, cervical spine activities will also be affected, serious will be accompanied by cerebral blood supply insufficiency, through physical examination and cervical spine MRI can confirm the diagnosis. Second, the pillow: incorrect posture during sleep can cause a pillow, resulting in pain in the neck muscles, cervical spine to one side, cervical spine activity is limited. After about two days of rest, the symptoms will naturally disappear, but the drop pillow is likely to recur frequently, should adjust the height of the pillow, avoid drunkenness, to prevent the occurrence of drop pillow symptoms. Patients who experience neck muscle pain must be diagnosed and treated early in order to get significant relief from clinical symptoms.