People spend13 of their life in sleep, and the correct sleep style and good sleep state are closely related to health preservation. Ancient health experts in China believed that people's sleeping direction should change with the alternation of spring, summer, autumn and winter. "When you are busy at four o'clock, you lie down", and the direction of sleep also corresponds to the solar terms at that time. Therefore, there are theories about the orientation of the bedside when sleeping, such as spring east, summer south, autumn west and winter north.

Looking up relevant information, it is found that people have endless opinions on the problem of bedside orientation. In addition to seasonal changes, some people think that the bedside should not face west, because this 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 the human body should sleep with its head facing north and its feet facing south, which is consistent with the direction of the earth's magnetic field. This kind of sleep mode 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. But according to experts, all these statements have no scientific basis.

Due to the limitations of ancient people's understanding, this statement is unscientific. Sleep is related to many factors, such as mood and psychology, and it is not just changing the orientation of sleep that can solve the problem of sleep disorder.

At present, there is no scientific theory to prove that the bedside orientation determines people's sleep, but insomniacs are easily suggested that changing the bedside orientation is effective when they are insomnia, even in the first few days, but they still suffer from insomnia after a few days, which cannot fundamentally solve the problems of insomniacs.