The correct direction of sleep should be head south or north. This follows the earth's magnetic field and can make the whole body blood flow smoothly. Please note the following

1) The bedside should not face west. This is obvious, because the earth turns eastward, which will affect the blood flow of the brain, thus affecting sleep health.

2) Don't be too close to the window. In fact, there are two problems when approaching the window. One is that the sound insulation performance of windows is lower than that of brick walls. When sleeping at night, people will hear louder noise than the sound away from the window. The other window is a light source, which will affect people's sleep.

3) Don't look in the mirror. This is actually an obvious psychological problem. In the bedroom at night, there is always a gloomy feeling when you look in the mirror, especially when you use a desk lamp instead of a fluorescent lamp in the bedroom.

4) Not facing the door. What's wrong when people sleep in front of the door? This involves a problem of psychological security, just like sitting on a stool with our back to the door and our side to the door, we feel different.