Sleeping in the flat position and sideways position are the correct positions to sleep in. The better sleeping position is flat lying position and lying to the right side. 1. Lying flat: This sleeping position distributes the weight of the body to the back in a more balanced way, so the internal organs will not be compressed, which is conducive to blood circulation and relieves neck and back pain. 2. Lying on the right side: when lying on the side of the legs and the body naturally bent, the whole body is relaxed, is conducive to lifting the fatigue, is a more comfortable sleeping position. Usually lie to the right side is more healthy, will not oppress the heart, reduce the burden on the heart. And in Chinese medicine theory, the right side of the lying position can let the blood return to the liver. Just as blood returns to the liver when a person lies down, blood is sufficient to nourish the liver, which is necessary for quality sleep. Therefore, it is recommended to sleep in a flat position or to the right side of the bed. In addition, pay attention to avoid maintaining the same sleeping position for a long time, in order to be comfortable.