Adequate sleep is very important for human health. According to relevant information, people need at least 6 hours of sleep every day. In addition, in terms of sleep preparation, posture and habits, pay special attention to some sleep taboos: 1, avoid eating before going to bed: after people enter the sleep state, the body part of the activity rhythm slowed down, into a state of rest. If you eat before bed, the gastrointestinal and other busy, which increases their burden, the rest of the body can not get a good rest, not only affect sleep, but also harm health. 2, avoid talking before bed: because talking too much is easy to make the brain excited, active thinking, thus making it difficult to sleep. 3, avoid excessive brain before bed: night such as work and study habits, to the more brain-damaging done beforehand, before going to bed to do something easier, so that the brain relaxed, so it is easy to fall asleep. Otherwise, the brain is in a state of excitement, even lying in bed is difficult to sleep, and over time, also easy to insomnia. 4, avoid emotional excitement before going to bed: people’s happiness and sadness are likely to cause excitement or disorder in the nerve center, making it difficult to fall asleep, and even cause insomnia. Therefore, before going to bed to try to avoid great joy and anger or worry and anger, so that emotional stability. 5, avoid drinking strong tea, coffee before bed: strong tea, coffee is a stimulating beverage, containing substances such as caffeine that can make people mentally stimulated, drink before bedtime is likely to cause difficulty falling asleep. 6, avoid sleeping with your head covered: the elderly are generally afraid of cold, so some elderly people like to sleep with their heads covered. In this way, due to the large amount of inhalation of their exhaled carbon dioxide, and the lack of necessary oxygen supplementation, is extremely detrimental to the body. 7, avoid sleeping on your back: sleeping position, to the right side and the best, so that the whole body bones, muscles are in a natural state of relaxation, easy to fall asleep, but also easy to eliminate fatigue. Supine so that the whole body bones, muscles are still in a state of tension, is not conducive to eliminating fatigue, but also easy to cause nightmares due to hand on the chest, affecting the quality of sleep. 8, avoid eye to light and sleep: people sleep, although the eyes are closed, but still can feel the light. Sleeping against the light, it is easy to make people disturbed, difficult to sleep, and even if you fall asleep, it is easy to wake up. 9, avoid when the wind and sleep: room to keep the air circulation, but do not let the wind blow directly to the body. Because after sleeping, the body’s ability to adapt to the outside environment is reduced, if the wind and sleep, over time, the cold air will invade the body, causing colds and wind chills and other diseases.