According to modern medical research, the human spine is a straight line from the front, but it has three physiologically curved curves from the side. In order to protect the normal physiological curvature of the neck and maintain normal physiological activities during sleep, pillows must be used when sleeping.
At present, the pillows are filled with various materials, such as chemical fiber, latex, down, buckwheat hulls…Different materials have different rebound times, and the better rebound time is 3-5 seconds. Pillows have a service life, ranging from six months to three years. After a long period of use, problems such as loss of elasticity, aging, and mites will occur.
Among them, chemical fiber pillows are the most common, but they are not very breathable, especially after a few months of use, they are easy to be compacted and deformed. Down pillows are relatively soft and comfortable to sleep, but it is difficult to maintain a certain height. It is recommended to use them with harder pillows.
Generally speaking, a harder pillow is good for human health, but an over-stiff pillow makes the contact surface between the head and the pillow too small, and the local pressure is too high, which makes people feel uncomfortable, and this is likely to cause excessive compression of the local nerves. The next morning, symptoms such as numbness or pain in the head, neck, back, arms, and hands will occur.
Too soft pillows are difficult to maintain the height of the pillow, because too soft compresses the scalp with a large area and is not conducive to blood circulation. At the same time, it also has the problem of poor air permeability. It cannot guarantee adequate breathing during sleep and may also pose safety risks. Therefore, the hardness of the pillow should be moderate, and the height of the pillow is different for different sleeping positions. It must be noted that when we lie on our back and side, the pillow height is about 15-20cm. For the health of the cervical spine, please choose a pillow rationally.
