About 1/3 of a person’s life in sleep, 1/5 of the time in the dream, why do people dream? The fundamental crux lies in the pillow with you to sleep, many people sleep after not only did not relax but more tired, and sleep is more difficult, even if you fall asleep is not stable, often dream in the middle of the night, resulting in the daytime spirit, sleep well, the pillow is very important. Pillow from: How did the word pillow come about? According to some relevant information, the term pillow was created by Cao Cao in the Three Kingdoms period. It is said that one night, Cao Cao in the army tent in the night reading, to three hours sleepy, beside the bookkeeper to ask him to go to bed to rest, the bed loaded with military books of the wooden box for a while there is no place to store, the bookkeeper will be flat on the bed at one end, Cao Cao is too sleepy, confused to rest his head in the wooden box on the sleep, and slept very well. The boy saw this situation, the shape of the wooden box, with soft materials produced a cushion to Cao Cao, Cao Cao asked what the name of this thing, the boy only answered cushion head of the bedding, Cao Cao will be such an object as the name of the “pillow”, and then gradually popularized in people’s lives pillow. Pillow, in fact, pillow is “neck”. Choose a suitable pillow, not only can you sleep well, but also to protect your cervical spine. How the pillow is the right pillow? The pillow that can help you maintain a normal physiological curve when you sleep is the right pillow. How to choose a suitable pillow First, you need to choose a “concave” pillow, the two sides of the high, low in the middle; Second, the pillow height is generally 8-15cm; Third, soft and hard moderate, but not too soft, not too hard; Fourth, the size of the moderate, can play a supportive role; Fifth, the pillow core excellent breathability. First, the shape of the cervical spine is a C-shaped arch bridge, when you sleep at night, you need to have something to support, to avoid the neck muscles long time tension work and lead to strain. The right pillow is the center of the depression, raised on both sides, gently wrapped around the neck, securely support the cervical spine, properly maintain the physiological curvature of the cervical vertebrae, so that the neck is comfortable, easy to spend every night. Second, the height of the high pillow? No! Pillow is too high, the angle of the neck and chest and back will increase, the trachea ventilation function will be blocked, easy to cause pillow, cervical spondylosis; high pillow is not good, then simply use a low pillow or not use a pillow? When the pillow is too low, the neck needs to be supported by the surrounding muscles, which will lead to neck strain and soreness for a long time, and even straightening of the physiological curvature of the cervical vertebrae, or inversion of the arch (opposite to the direction of the normal physiological curvature). Pillow height is more conducive to blood circulation in the neck, providing enough oxygen for the brain, wake up more awake and full of spirit. Modern medical research, people sleep in the supine position, the pillow height is best to control the height of the vertical fist; side sleep, the pillow height is best 1.5 times the height of the vertical fist. Generally in 8-15cm, not everyone is the same height, suitable, comfortable is the best. Third, soft hardness If the pillow is too hard, the area of contact with the head is reduced, the pressure increases, the human body and the part of the pillow in contact with the body will feel uncomfortable. Pillow is too soft, easy to cover the nose when sleeping on the side, not conducive to breathing. Pillow elasticity can not be too large, otherwise the neck is very tired, easy to cause neck muscle injury. Fourth, the texture of the texture is soft and comfortable, good elasticity is not easy to deform, strong support. The current tendency to choose natural materials, such as spice velvet, buckwheat hulls, cotton, latex, memory foam and so on. Chinese medicine pillow has a very useful sleep aid, such as silkworm sand, cassia seeds, lavender, thorns, rooibos, chasteberry, ginkgo biloba and so on. The cervical spine has a forward curvature called physiological proptosis, and people are most comfortable in any situation where they can maintain this natural physiological curvature. When the cervical spine becomes straight or recoils, it is recommended that a cylindrical pillow be used for correction.