Some people often wake up in the morning to feel pain and discomfort in the neck, sometimes a pillow, which is related to the night sleep position, in the end, what kind of sleep position is correct? About one-third of life is spent in sleep, in this long years, sleep posture is reasonable or not, will have a huge impact on the human body. Because of the different sleep habits formed by each person since childhood, so there are different sleep positions. Prone position often makes the head and neck in an extremely twisted position on one side, which can easily cause strain and degenerative changes in the neck muscles, ligaments, joints, etc. and lead to the occurrence of neck diseases, and again there is also compression of the heart and lungs affect breathing, increasing the burden on the heart and lungs, so it is not suitable. Left-sided position also has the tendency to increase the burden on the heart, is also not ideal. So what kind of sleeping position is reasonable? As long as it does not affect or aggravate the heart burden, does not cause deformation of the body, especially the head and neck and spine, can make the whole body muscles fully relaxed, conducive to the rest of the sleep position are reasonable, generally speaking, supine or right-sided sleeping position is good, so that the limbs are naturally straight or slightly flexed, the whole body muscles are easier to relax, more in line with the above requirements. Just how high the pillow is appropriate? Generally speaking, the available own fist as a standard, about a fist to a fist and a half high pillow, in line with human physiological requirements, so that the neck muscles relax.