Reason:
Because the earth itself has a geomagnetic field, and the direction of the geomagnetic field is north-south (South Pole and North Pole), the magnetic field has the property of attracting iron, cobalt and nickel, and the human body contains these three elements, especially the blood contains a lot of iron, so sleeping with the head facing north and feet facing south can conform to the geomagnetic field lines, so that the magnetic field lines can smoothly pass through the human body, reduce the interference of the geomagnetic field to the human body, and sleep more comfortably.
In addition, Chinese medicine also believes that people should sleep with their heads facing north and their feet facing south. The explanation is that with this sleeping orientation, the direction of qi and blood in the human body is consistent with the direction of the earth's magnetic field lines, which is easy to make qi and blood smooth, reduce metabolic rate and reduce energy consumption, and naturally feel refreshed when you wake up.
Extended data
Best sleeping position:
Many ancient and modern medical scientists believe that lying on the right side and slightly bending the body is the best sleeping position, regardless of men, women and children. This is mainly due to human physiological structure. The human heart is located on the left side of the chest, the openings of the gastrointestinal tract are all on the right side, and the liver is also on the right side. If you lie on your side, you can relieve the pressure on your heart. If the pressure on the heart is small, it is beneficial to the pumping of blood and increase the blood supply flow of organs such as stomach and liver. At the same time, when you lie on your right side, things in your stomach will easily flow into the duodenum and small intestine, which is beneficial to the digestion and absorption of food and the metabolism of the human body.
In addition, sleeping in this posture can relax the muscles of the whole body during sleep, ensure smooth breathing and minimize the physiological activities of the heart, lungs and gastrointestinal tract. Because the heart is not oppressed and the lungs breathe freely, it can ensure the oxygen supply needed by the whole body during sleep, so that the brain can get a full rest and improve the quality of sleep.
People's health network-tips of traditional Chinese medicine: which direction to sleep longer?