The body should be parallel to the latitude.
Why do we feel tired? It is largely due to hypoxia caused by insufficient blood supply to the head. Why is lying down easier to recover than sitting or standing? On the surface, the trunk and limbs are relaxed. In fact, it is more important to lie flat so that blood circulation can run to the brain more conveniently. Scientists have tested that standing upside down in a short time is more refreshing than lying flat, although the body is still exerting strength during the handstand.
Therefore, you should sleep with your head facing west. Because we know that the earth rotates from west to east, and the head facing west is equivalent to borrowing the rotation force of the earth, and blood is more likely to gather to the head.
It is best to go northwest.
The direction of sleep is quite important. Chinese medicine says that the human body should "stand pulse" and "stand qi" during sleep. This "standing" actually means that the direction of qi pulse in the body is consistent with nature, so that blood vessels will be unobstructed. We know that the terrain of our country is high in the west and low in the east. Along the mountain and water potential, the direction of airflow is northwest to southeast. Therefore, I suggest that people sleep with their heads facing northwest and their feet facing southeast, so that the qi pulse of the human body is consistent with nature. The second direction is that the head faces west and the feet face east, or the head faces north and the feet face south. Home feng shui knowledge: /University_Furniture.aspx