When lying down, it should support the neck's natural C-curve, and when resting on the side, it should be pleasant for the cervical spine. Sleep, which accounts for one-third of our lives, is critical for recovering from weariness and preserving health and well-being. The cervical spine consists of seven bones, six discs, numerous muscles, nerves, ligaments, tendons, blood vessels, nerves, lymphatic systems, and a variety of other tissues.