A pillow that is too high will change the normal physiological curvature of the cervical spine, causing muscle fatigue damage and ligament stretch strain, causing pain, cramps and even cervical spondylosis.
If the pillow is too low, the head and neck will inevitably fall back, which can easily cause snoring and other phenomena, as well as an imbalance in the blood supply.
The pillow is too hard, the contact area with the head is small, the pressure is strong, and the scalp is uncomfortable.
The pillow is too soft to maintain a certain height, the neck muscles are prone to fatigue, and the head sinks in the meantime, which will affect blood circulation.
Therefore, when choosing a pillow, it is necessary to ensure that the height and hardness of the pillow are moderate, so as to promote our sleep. In principle, the width of the pillow should be the same as the width of the shoulders, just slightly wider than the shoulders; the height of the pillow needs to be determined according to the sleeping position, if you sleep on your back, the height of the pillow pressed down is approximately equal to the height of a fist; if Sleeping on the side, the pillow height is slightly higher than the vertical height of the fist.
