Sleep time accounts for 1/3 of a person's life, so be careful with your posture. However, in fact, many people don't understand the complexity of sleep. Proper sleep can prolong life, but unhealthy sleep can cause diseases. Take Su as an example, many people suffer from cervical spondylosis because the pillow only rests on the back of the head.
The doctor said that the standard of a good pillow is to keep the cervical spine in a normal physiological curve. Using the wrong pillow often causes neck and shoulder muscle pain or headache, and even chest tightness in severe cases. Using pillows scientifically and keeping a correct sleeping position should be like this:
When lying flat, the pillow must be just from the whole head to the neck, not to the shoulders, and not only to half of the back of the head, so as to keep the head and body neutral and prevent cervical fatigue. According to this standard, a pillow with a low middle and high sides is a good choice. You'd better put a small pillow under your knee.
When sleeping on your side, double the height of the pillow and put a small pillow between your knees.
It is best to avoid sleeping on your stomach, because the cervical spine will bear too much pressure.
Some people are used to not using pillows, which is actually wrong. Because the head will lean back when sleeping, the pressure on the cervical spine will be twice as high as when walking forward, which will lead to deformation and pain of the cervical spine in the long run.
Remember to lean sideways when you get up, and then get out of bed with your hands up. Don't stand up straight.