A scientifically reasonable pillow should have the following three points: suitable height, good breathability, and comfortable softness.

The height of the pillow varies from person to person. Generally speaking, the reasonable height should be the height of one’s own fist behind the pillow. Such a height can make the neck in a comfortable position. Due to the change of movement when sleeping, supine and side sleeping have different requirements for the height of the pillow, and the height of the pillow should be able to change accordingly, which requires good elasticity of the pillow. People often only notice the physiological curve between the height of the neck and the back of the head when lying on their back, and the pillow is made into a shape with a high neck and a low back of the head. This does increase the comfort of the pillow to a certain extent and avoids some injuries to the cervical spine, but it cannot meet the needs of lying on the side. Long-term lying on a pillow that is only suitable for one sleeping position will change the natural curvature of the cervical spine and compress nerves and blood vessels.

The inner filling is directly related to the hardness and air permeability of the pillow. The pillow cannot be too hard or too soft. If it is an ancient porcelain pillow, the neck muscles will be tight for a long time, and if it is too soft, the head will be buried in the pillow, which will affect the inhalation of oxygen.

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