As the saying goes: high pillow without worry. In fact, it is not worry-free, sleep with a pillow too high, easy to lead to cervical spondylosis. There are seven cervical vertebrae in the human body, and they are arranged in a row. From the side of the cervical vertebrae have a mild convexity, from the back of the cervical vertebrae are lined up in a straight line, neither to the left nor to the right. When this state is maintained, the neck muscles, ligaments, intervertebral discs and other organs of the neck, such as the trachea, cervical arteries, veins and nerve tissue to be in a reasonable, relaxed, comfortable state. When high pillow, whether lying on the left or right side, it will make the cervical vertebrae in a non-physiological bending state, which makes the neck muscles, bones, ligaments and other tissues in a state of tension, do not get real rest, and even make some neurovascular pressure, resulting in neck discomfort, pain, dizziness, dizziness and other performance after sleep; if lying on the back, it makes the cervical vertebrae overflexed, in addition to causing the above problems, but also make the respiratory tract not If you lie on your back, the cervical spine will be overflexed, which will not only cause the above problems, but also make the airway not smooth and snore. If you are obese, it will be more serious and may cause apnea, which is called “sleep breathing disorder syndrome”. In the long run, it can cause a series of symptoms such as increased blood pressure and memory loss. Of course, the pillow is too low or do not use the pillow to sleep, the same will make the cervical spine in a non-physiological bending state, and the occurrence of the same high pillow malady. So, how high the pillow is appropriate? This is no uniform standard, should be combined with their own body shape selection. Generally in the supine position, the head pillow on the pillow, the central part of the pillow in the state of pressure height in about 10 cm is appropriate to maintain the physiological curvature of the spine. To wake up after the neck without any discomfort as the standard, which is like buying clothes, but also need to be tailored to fit.