There are no special requirements in this regard. How comfortable should be how to sleep. From a medical point of view, the pillow is not suitable too high, because the curvature of the cervical spine is forward, too high easily let it form a kind of reverse arch, you are not comfortable at this time. There are no special requirements for sleep posture, but also how comfortable how to sleep. For the cervical spine has a reverse arch patients, or use a small towel, roll it into a small circle on the back of the pillow, so that the cervical spine activities slowly restore, so that the pain can be relieved.