Under normal circumstances, the cervical spine has a forward convex arc, known as physiological pronation. In the case of people awake, whether working or studying, whether standing, walking or sitting posture, it is most comfortable to maintain this natural posture. If you keep your head down for a long time, the back of your neck will feel fatigued; and if you tilt your head for a long time, you will also feel uncomfortable. As the saying goes, “sleep has a sleeping face, sitting has a sitting face”, 1/3 of a person’s life is spent in bed, so the correct sleep posture is very important. The human body in bed to maintain the normal physiological convexity of the cervical spine, in line with the physiological requirements of the cervical spine; so that the neck muscles, intervertebral discs, ligaments, etc. are in a natural relaxed state of rest. Human sleep time accounts for nearly 1/3 of the entire life, the pillow also accompanied us nearly 1/3 of the life course. Therefore, it is very important to choose a good pillow when sleeping, which has a great impact on the rest state and the health of the neck and shoulder back. Should be used to meet the health requirements of the pillow, bad pillow is often the bane of many neck, shoulder and back pain. Many people may not even realize what problems the pillow will have, and will not put a lot of effort into choosing a pillow, many people’s pillow is either too hard, or too soft; either very high, or very short; some filled with cotton, some stuffed with clothes, some sponge, and many people in the pillow filled with spring pillow heart. Think about it, the whole night so long to pillow the head in an extremely uncomfortable position, the neck and shoulder muscles should be how tense ah! The human spine, frontal view is a straight line, the side is a curve with four physiological bending; neck 7 vertebrae arranged into a light arc forward convex shape. Therefore, the role of the pillow is to sleep under the head and neck, so that the cervical vertebrae in sleep also maintain a roughly normal physiological curvature, and make the neck skin, muscles, ligaments, intervertebral discs, intervertebral joints and through the neck trachea, esophagus, nerves and other tissues and organs in sleep with the whole body to relax and rest. The occipital part of the head (back of the head) is protruding backwards, while the cervical spine form is a clear convexity, the pillow should be able to accommodate the occipital part of the head this convexity and support this convexity of the neck, so that the tissues and organs of the neck will be in a relaxed state of rest. Unsuitable pillows, incorrect sleep posture, may make the above-mentioned tissues even when resting in bed is difficult to be in a natural relaxed rest state, will cause excessive tension and strain on the ligaments and muscles of the neck, accelerating intervertebral disc lesions and cervical joint dysfunction. It may make people feel neck discomfort during sleep, tossing and turning, and still feel neck soreness, pain, weakness and discomfort the next morning. Long-term poor sleep posture can induce or aggravate neck and shoulder pain. The pillow is too high or too low is not suitable. The height of the pillow to keep the cervical vertebrae in the sleep of the normal physiological convexity is most appropriate, so that the morning up will not neck back pain. Normal people sleep on high pillows, whether supine or lateral, will make the cervical flexion is abnormal, so that the cervical spine physiological convexity disappears or instead of convexity, so that the cervical vertebral space in a state of high pressure state of forward curvature, so that some local muscles in the neck overstressed. Over time, the neck muscles will strain, spasm, accelerate the degeneration of the intervertebral discs, and contribute to the formation of bone spurs, cervical instability, etc.. Over time, it will inevitably cause or induce cervical nerve roots, spinal cord, sympathetic nerve, or vertebral artery stimulation or compression, resulting in cervical spondylosis, and the corresponding clinical symptoms. Normal people who sleep with low pillows for a long time will also make the cervical spine curvature abnormal. At the same time, because the veins of the head without valves, sleeping on a low pillow, gravity can slow down the venous reflux in the brain, the relative increase in arterial blood supply, resulting in head swelling, irritability, insomnia and other uncomfortable symptoms. At present, the pillow used by urban residents in China is basically rectangular flat pillow, this pillow, although beautiful and generous, but not necessarily fully in line with the physiological needs of the human body, if the long-term use of the pillow does not meet the requirements of cervical health, will destroy the physiological curvature of the human cervical spine, so that it straightens or bends in the opposite direction, over time will fall or suffer from cervical spondylosis. So, what kind of pillow meets the health standards? For normal people, the height and hardness of the pillow and each person’s fat and thin, the width of the shoulder, the length of the neck, to the degree of comfort, and there is no certain uniform standard. To choose the most appropriate to meet the physiological curvature of the human cervical spine, soft and hard suitable, comfortable and beautiful pillow. Shoulder wide body fat person pillow can be slightly higher, while thin people can be a little lower. Generally speaking, the length of a single pillow to exceed the width of their shoulders 15 cm is appropriate. For people who are used to lying on their backs, the pillow height should be compressed and their own fist high (fist tiger mouth upward height for the fist high standard) is appropriate; and people who are used to sleeping on their sides, the pillow height should be compressed and their side of the shoulder width is the same height as appropriate. At the same time the choice of pillow should be breathable, in the surface of the pillow, support the back of the neck (neck curvature) part should be slightly higher, and have a certain hardness, in order to be able to set off and support to maintain the physiological curvature of the neck. And support the back of the head part should be lower than the above-mentioned part of the distance of 3 ~ 5 cm, so that it can fully support the head, but also with the physiological curvature of the neck. The inner filling of the pillow (pillow heart) is also crucial and should be chosen reasonably according to the actual situation of the individual. The filler can not be a large piece of cotton or sponge in the first place, it is best to fill it with a finer granular material. Because the granular filler can be well shaped, the back of the head can be pressed out of a crater when sleeping, the corresponding raised part can just hold the forward convex neck. Another requirement of the filler is a certain degree of water absorption, so that it can absorb sweat and keep the neck dry, so that after use, the pillow should often be dried out. Here to recommend you a few fillers can be used as a pillow pillow heart: deflated grain: better than buckwheat hull shaping and absorbency, may be slightly heavier; its disadvantages and buckwheat hull pillow similar. Buckwheat hulls, which are the most common filler, are available on the market. Soft and hard, shaping and absorbent performance are good, but also relatively light; disadvantages are poor elasticity, and turning and head and neck activities when the pillow has a loud sound, for insomnia and other poor sleepers, may affect sleep. Rice bran skin: there is a certain shaping performance, better than cotton or spring. But its sharpness tends to pierce the fabric and irritate the skin. Moreover, it also has a similar disadvantage to buckwheat hull pillow that tends to have a rattle. Silkworm sand: dried from the manure of mulberry silkworms, silkworms eat mulberry leaves, and no odor. Shaping performance and water absorption is very good, is an extremely rare pillow filler. The pillow in summer has the effect of cooling and defeating fire, also has the effect of calming and quenching the wind; folk often used for babies who cry at night, it is said to have a calming effect; for those with strong lung fire, it has the effect of clearing heat and cooling the blood. Pope down: the bushes are dried and processed, the performance is similar to down, the disadvantage is sometimes easy to knot into small pieces, such as frequent drying can be avoided. Cotton pillow heart comfortable and soft, and a certain degree of hardness, also good. Other pillow fillers: such as residual tea, chrysanthemum, mulberry leaves, cocklebur or other Chinese medicine pillow, as long as it meets the requirements of shaping can be used, but do not see very much care about its drug treatment effect. In recent years, with the progress of science and technology, market prosperity, some high-grade filler pillows made of pillow heart has also come on the market, here to give readers some simple introduction. Down pillow: down refers to the long in the goose, duck chest below the role of cold soft down, under the microscope, each down filament are triangular skeleton structure, with the change in temperature and natural contraction and expansion, thus producing temperature regulation, moisture regulation function, high permeability, can provide the body with a dry and comfortable “small environment”. The triangular structure also allows the down to absorb a lot of air, down pillows will therefore have other pillows difficult to match the fluffiness. In addition, down fibers have a strong return elasticity, after a period of time to use hard pat, will return to fluffy original shape. But the down pillow price is not expensive, there are some low down content (10% or so) on the market, the price is lower, so that ordinary wage earners can also appreciate the unique fluffy pillow comfort. Man-made fiber pillow: artificial fiber light soft, flexible characteristics make it a low-cost material for pillow heart production, but the origin of chemical fiber makes it poor in natural breathability. However, the development of science and technology soon to make up for this shortcoming of artificial fibers, the interior of the artificial fiber through a to several pores, so that each fiber can store more air, the pillow made of this will have a better elasticity and breathability, which is artificial hollow fiber pillow. With good elasticity, low price, easy to clean, mold and insect resistance and other advantages. Latex pillow: latex pillow is a new generation of pillow on the market in recent years, due to the use of natural rubber by the “foam” process once formed and made, this pillow heart because it is a purely natural material, unlike other synthetic foam, sponge-type materials, non-toxic tasteless, no adverse effects on the human body. Moreover, the structure of the whole piece of latex eliminates the interference of fine fibers on the human body, especially suitable for people with fiber allergies and asthma patients. In addition, by the foam treatment of latex pillow heart breathable, pillow to go without the feeling of stuffy stagnant weight. Also, the special processing process makes the latex pillow heart easy to shape, according to the characteristics of the cervical spine to create different shapes of pillows. Due to the material factor, the price of latex pillows is slightly more expensive than other varieties of pillows. When choosing a latex pillow, it is important to note that there is some confusion in the market about the name of the latex pillow, some synthetic foam, sponge pillow is also called latex pillow, should be asked when buying clear. Currently on the market sold pillows, health pillows of many kinds, but some ignore the maintenance of the physiological bending of the neck, to keep the neck tissue rest of the key factors, and the internal drug action time is short, need to be replaced often, coupled with the higher price, so the general income of consumers difficult to accept. Special attention needs to be paid to the fact that some pillows also have certain adverse reactions, which can produce symptoms such as dizziness, chest tightness and weakness. In addition, the coat of some pillows may also cause a few people allergic, so when choosing a pillow must pay attention to whether it will have an impact on human health.