Face up in hot weather, and protect your stomach with one hand or both hands; If something covers it, you can let go of your hands. It is best not to blow the electric fan. Reason: In summer, there is a lot of heat in the human body, so it is easy for people to dissipate heat while sleeping, but the temperature will drop at night. Human organs are only protected by bones and muscles (mostly), and the stomach is the easiest to catch cold, so it is best to protect it. Suggestion: You'd better not turn on the air conditioner to sleep. If you want to open it, you'd better cover something.
When it is cold, face to the right, put your hands on the shoulder pads or hold the pillow. Cover your shoulders with a quilt, but don't block your nose and mouth. Reason: Sleeping on your side in cold weather can curl your body and keep warm easily. The pillow can reduce the air space in the quilt and keep warm easily. Sleeping to the right is because the human heart is slightly to the left. When people sleep, the activity of individual organs of the body drops to the lowest point, and when it is cold, the blood flow rate will slow down. At this time, the activity of the heart is weakened, but the required power is increased. The quilt covered by the body will oppress the heart, so try not to let your body oppress the heart, so as not to reduce the life span of the heart and the possibility of sudden death during sleep. The patency of the nose and mouth also ensures the normal activities of the lungs and does not suffocate.