1 ~ 3 am is ugly, and the liver meridian is the most prosperous. Huangdi Neijing says that "blood belongs to the liver when people lie down", and the best time for nourishing blood and producing blood in the liver is 2 1 to 3 am. If people stay up until 1 o every day, the liver can't get back blood, toxic blood can't be discharged, fresh blood can't be born, and human viscera can't be nourished by qi and blood, which is very easy to get out of balance and cause disease. How can we ensure a good sleep? There are many reasons for insomnia, but its root lies in the imbalance of material body. In order to ensure a good sleep, you need to do "five noes": 1 before going to bed, but don't be too full: Chinese medicine says that "stomach disharmony leads to restless sleep", because people need to rest at night and their spleen and stomach also need to rest. Overeating at dinner will increase the burden on the spleen and stomach, disturb the yang of the spleen and stomach, and thus affect sleep. Therefore, dinner should be seven or eight minutes full, as light as possible, protect the spleen and stomach, and clear the yang. 2, but don't move: it is not appropriate to do strenuous exercise before going to bed and disturb the yang, including watching TV before going to bed, talking and chatting and other activities that disturb the yang. Moreover, the radiation of TV, audio and other electrical appliances will interfere with the autonomic nerves of the human body. Therefore, it is not advisable to do strenuous exercise, watch TV or chat half an hour before going to bed. 3, Dan Si: the spleen dominates thinking, thinking more hurts the spleen, and thinking more is easy to disturb the mind. Thinking is yang, sleeping is yin. Therefore, it is advisable to recuperate before going to bed, so as to "sleep first and then sleep" and help yang enter yin to facilitate sleep. 4, but not too late: 1 1 pm later, the gallbladder meridian opens yang and is pneumatic, which makes people easy to lose sleep, easily dissipates the qi of the liver and gallbladder, and makes foreign evils invade the body. So you'd better go to bed at 9 o'clock, no later than 10: 30. 5, free from the wind: the wind is the beginning of all diseases, pervasive. Sleeping at night, opening the window and turning on the air conditioner will blow away the yang on the body surface of the guards. After being blown away, the yang will regenerate and then be blown away by the wind, so that the yang will be washed away overnight. Therefore, close the doors and windows and air conditioning before going to bed to protect the yang on the body surface.