It is recorded in ancient books that "the living face south and the dead face north", which shows that sleeping south is the right way. Because there is plenty of sunshine in the south, people often sleep in this direction, and their yang will be supplemented, and it will not damage the human body's Yuanyang and Shenyuan, which is also beneficial to the body.

And contemporary science also explains it from the perspective of magnetic field. The earth has a magnetic field, and so does the human body. When you sleep with your head facing south and your feet facing north, it conforms to the direction of rotation, and you will not feel disturbed and headache, so it is very good and healthy.

In fact, people have endless views on the orientation of the bedside. Some people think that the bedside should not face west, because it will make the direction of human body position movement opposite to the direction of the earth's rotation, making the human body feel uncomfortable.

It is also said that people should sleep with their heads facing north and their feet facing south. This posture is consistent with the direction of the earth's magnetic field. This way of sleeping in line with the direction of the earth's magnetic field can reduce the influence of geomagnetic field on human body, thus helping people to keep a good sleep. In addition, there is a saying in Chinese medicine that the human body should follow the "four-season health preservation", that is, change the sleeping position with the alternation of spring east, summer south, long summer middle, autumn west and winter north.