How much common sense do you know about the healthiest sleeping position?

Sleeping on your back is the best sleeping position. It is best to put a small thin pillow under the knee joint to reduce the tension of the spine and maintain its physiological curvature. Sleeping on your back is easy to keep your head, neck and spine in a straight line to prevent neck and back pain. At the same time, it can reduce gastric acid reflux, because the face is no longer under pressure and wrinkles are not easy to appear.