Why refuse to wake up a sleeping person suddenly?

In deep sleep, the unconscious person has no external contact. So, if he wakes up suddenly, there is a fear that his mind will shut down, he will go crazy. That is why no one suddenly wakes up a sleeping person.

Why should not sleep with your face covered?

Every living thing performs respiration. Breathing takes air through the nose and into the lungs. There, the blood takes in oxygen from the air and gives up carbon dioxide. By sleeping with your face covered, the carbon dioxide vapor cannot escape or the fresh air from outside cannot enter the bed. As a result, the polluted carbon dioxide that leaves the body re-enters the body. Which is harmful to the human body.