The use of u-shaped pillow in the sitting position rest is on the cervical spine has certain benefits, normal lying down to sleep, the role is not great. Daily working life, in some have to sit in a standing position to rest under the circumstances, such as riding the high-speed rail, wearing a u-shaped pillow can effectively maintain the normal physiological curvature of the cervical spine. Because in the upright position rest, the human head and neck will be unconsciously biased to one side, long time to keep this twisted action will cause one side of the cervical vertebrae serious fatigue as well as the neck muscles of the obvious aches and pains. At this time, wearing a U-shaped pillow can make the cervical vertebrae remain in the middle position, thus effectively protecting the cervical vertebrae. In normal lying rest, if you can maintain the supine position or side lying position, the u-shaped pillow to adjust the normal curvature of the cervical spine to protect the cervical spine is not obvious. The u-shaped pillow can be used according to the specific situation in daily life.