Some data show that more than 50% of people have experienced "sleep paralysis", and the frequency of sleep paralysis in non-Nigerian African people is higher than that in white people. Scientists have determined that the symptoms are related to life stress, mostly in adolescents and young people. 1. Sleeping with a light on can lead to weight gain, according to a study by the University of Ohio. Even a balanced diet and active exercise are inevitable. 2. If you sleep too close to the wall, your joints are easy to be injured. According to experts, the temperature difference between the wall and the room can be 3 ℃ - 8 ℃. If there is no distance of more than 20 cm in the middle, or there is no barrier of wood materials, the cold air on the wall will cause harm to the human body, which is likely to induce some cold diseases such as arthritis, rheumatism, rheumatoid, etc. 3. It is not suitable to wear hemp pajamas when sleeping. A survey on pajamas shows that pajamas made of vari...