Pillow generally choose not easy to deformation, supine position, the pillow can be close to the cervical spine, does not cause suspension, and can maintain the normal physiological curvature of the cervical spine is good; side lying position, the pillow should be a little higher than the pillow used in the supine position, taking into account the side lying position, the upper limbs and arms contact the bed, to be high enough pillow to hold up the cervical spine, so that the entire spine of the human body in the same line, not to the side. The pillow that meets this requirement is suitable for you and varies from person to person.