Generally speaking, a harder pillow is good for human health, but a harder pillow makes the head-to-pillow contact surface too small, and the local pressure is too large, making people feel uncomfortable, and this may cause excessive pressure on local nerves. Large, causing numbness or pain in the head, neck, back, arms, hands, etc. the next morning; too soft pillows are difficult to maintain the height of the pillow, because too soft the large area of the scalp compression, which is not conducive to blood circulation At the same time, there is also the problem of poor breathability, which cannot guarantee sufficient breathing during sleep, and there may also be hidden safety hazards. Therefore, the hardness of the pillow should be moderate, and the height of the pillow is different in different sleeping positions. It must be noted that the pillow height is about 15-20cm when lying on the back and lying on the side. For the health of the cervical spine, please choose the pillow rationally.
The simple self-examination standard for judging whether to change the pillow:
1. In the absence of other physical diseases, the neck numbness often rises after morning rise.
2. The pillow has lost its elasticity and needs to be patted for a while before it can recover some elasticity.
3. After finally adjusting the pillow, it quickly returned to flat.
4. Pillows have agglomeration and unevenness, and the filling has a smell of moisture.
How long to use the pillow is suitable for replacement: There are many people who change the pillow only every four years. In fact, the pillow should be replaced every 1-3 years.
