Proper position when using pillows

When sleeping, the reasonable position of the head on the pillow is very important. Generally speaking, it's best to put the head in the upper position in the center of the pillow, so as to stabilize the sleeping posture and avoid pillow falling caused by frequent posture change at night. Second, it can make the neck have a certain supporting force and maintain the normal physiological curve of the body. The normal sleeping position is to lie on your back with the head in the middle of the pillow and the neck on the edge of the pillow. The pillow will play a supporting role on the neck and will not cause the pressure of the cervical spine. If the pillow core material without elasticity is used, the middle of the pillow can be flattened, and the pillow of the neck can be padded high, so that the cervical spine will neither bend forward nor bend sideways, and maintain an appropriate backward extension position, so that the cervical spine will not be sore in the morning.