Is carefree meaningful? Is sleeping high good for human body?

The old saying "sit back and relax" is actually not scientific. The pillow is too high, no matter what position you sleep in, you can't keep the normal lordosis of the cervical vertebra, which will increase the burden of the cervical vertebra and do great harm to the health of the neck, and will cause cervical spondylosis over time. If you have neurasthenia symptoms such as neck pain, headache, dizziness, tinnitus and insomnia, or feel numb during sleep, it may be that the pillow is too high; It is best to choose a pillow that can keep the normal physiological curvature of the neck whether sleeping on your back or on your side. The height of the pillow for adults is 15 ~ 20cm when lying on their back, and about 20 ~ 15cm when sleeping on their side.