The cervical vertebrae are located in the cervical segment of the spine, the vertebral body is small, there is a transverse foramen on the transverse process, the vertebral artery and vertebral vein pass through this foramen, and the upper and lower notches of the neighboring vertebrae enclose the intervertebral foramen, which has spinal nerves and blood vessels passing through. The intervertebral discs and ligaments are connected to form a forward-convex physiologic curvature. Sleeping needs to be supported by a support point higher than the bed surface, so that the neck in a relaxed state to maintain the natural physiological curvature. Do not sleep pillow easily lead to cervical vertebrae physiological curvature increase, and make the neck muscles in a continuous state of tension, a long time of bad sleeping posture can lead to the occurrence of cervical spondylosis. If cervical spondylosis patients do not sleep pillow can lead to aggravation of the condition. Daily life should choose to fit the cervical physiological curvature of the pillow, not too high, not too low, so that the head and neck get better support.