The human body has a normal physiological curvature, especially the cervical spine, the pillow can help the human spine, to maintain a good curvature, so as to reduce cervical spine injury. If the protection is not good easy to appear dizziness, nausea, vomiting, neck pain and other symptoms, and even serious cervical spondylosis. At the same time, if you don't use the pillow when you can increase the blood circulation of the head, the next day is easy to appear dizziness, fatigue symptoms, so it is recommended to give a comfortable pillow during sleep. The height of the pillow directly affects the quality of human sleep.
So life must choose a comfortable pillow, the pillow can not be too high or too low. It can be seen that the pillow plays a vital role in human sleep.