If you take the supine position, then the pillow should be padded in the neck, so that the chin up 15 °, in order to maintain the normal physiological curvature of the cervical spine, so that the muscles of the neck thoroughly relaxed rest, while keeping the airway open, can reduce snoring. If you are lying on your side, the height of the pillow should be the same width as the shoulders, the general requirement of the pillow in the case of compaction is about 10 cm, to keep the cervical vertebrae in the horizontal position state, too high and too low will make the cervical scoliosis. Pillow outside the right pillow, through the pillow can also be self-correcting existing cervical spine disease. For example, if your cervical curvature disappears, then you sleep with the pillow in the neck, which is tilted 15-20 on the jaw, the pillow can shape the normal curvature of adults. If your cervical spine is curved on the right side, then sleep on the right side with the upper part of the pillow padded.