The cervical vertebra is located at the top of the human spine, wrapped around the neck and composed of seven vertebrae. The so-called physiological radian is the smooth and forward arc formed by these seven vertebrae, and the function of the pillow is to maintain this normal physiological curve. If you don't use the pillow for a long time, the cervical vertebra that should be bent will become straight, which will lead to hunchback, damage the cervical vertebra and affect the health of the whole spine.
Extended data:
The reason for sleeping with a pillow:
When sleeping without a pillow, the position of the head is lower than that of the heart, which will lead to more blood flowing into the head and affect the blood circulation of the head. It will lead to blood vessel filling, tube wall compression, dizziness after waking up, eyelid edema, etc., which will seriously affect the quality of sleep.
Moreover, if you put your head up to sleep, your chest will be raised, so that the blood in your lower body will flow downstream, reducing the burden on your heart.
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