It is more comfortable for people to sleep with their heads facing north and their feet facing south. This is because the earth itself has a geomagnetic field, and the direction of the geomagnetic field is north-south (South Pole and North Pole). Magnetic field has the property of attracting iron, cobalt and nickel, which are contained in human body.

In particular, blood contains a lot of iron, so choosing the orientation of the head, north foot and south foot to sleep can conform to the geomagnetic field lines, so that the magnetic field lines can pass through the human body smoothly, minimize the interference of the geomagnetic field to the human body, and make sleep more sweet.

Extended data

Sleep and health:

Sleep is a major function of health preservation, that is, replacing rotten cells with a large number of healthy cells. If you can't sleep all night, you can't replace new cells. If one million cells die during the day and only 500,000 cells are recovered in one night, then your body will lose. Over time, people will chaff, just like chaff radish.

In real life, many people have difficulty falling asleep and poor sleep quality. Poor sleep is a comprehensive problem, such as excessive anger and vigilance against sleep; Excessive stomach fire and restless sleep; Insufficient liver yin, tired from sleep.

People's Network-Tips of Traditional Chinese Medicine: Which direction to sleep longer?