People with bad cervical spine should do the following precautions when sleeping: First, keep the soft tissue around the cervical spine fully relaxed, such as in the flat position when the pillow to their own fist high shall prevail, to the pillow cushion in the back of the head slightly under the position, and to fill the back of the head below and the back of the neck completely, keep the head slightly back, in order to meet the normal physiological curvature of the cervical spine, muscle tissue to be able to completely relaxation. The height of the pillow should keep the head, neck and torso in a straight line at the time of misalignment, and the muscle tissue can be fully relaxed. Second, the cervical vertebrae must be strictly warm, can not appear cold, if the cervical vertebrae are not good, you can bring a collar for cervical vertebrae warmth, and try to wear high-collared clothes at night, to do a good job of covering clothing to avoid getting cold.