Health preservation in winter should be based on the characteristics of everything, kidney qi and water, and pay attention to several aspects of conditioning. Now here is the information about winter health care collected at ordinary times. Cold clothes in winter, clothes should be warm and comfortable, which is conducive to smooth blood flow, because suitable clothes are like a panacea for health. Eating in winter should be based on the principle of nourishing yin and hiding yang. Hu Sihui, a nutritionist in Yuan Dynasty, pointed out in his book Eating Rice that winter is cold and should be treated with heat. It advocates eating hot food and giving a warm and yang-nourishing diet, so it often uses mutton, dog meat, shrimp, leek, sparrow eggs, fungus, turtle and other foods. Do not eat cold food, eat fresh vegetables such as spinach and bean sprouts. Winter diet should be less salty and bitter to nourish the heart. Because in winter, the kidney is full of water, salty is water, and the heart is fire. Eating more salty food will help water suppress fire and make the heart sick. Heart is bitter, eat more bitter products to protect the intersection of heart and kidney. Hot drinks after getting up in winter can be advanced, such as cheese, lotus seeds, longan, jujube soup, etc., which is beneficial to the heart and spleen; Or drink to boost your stomach. Due to the decrease of winter activities, human metabolism slows down. Therefore, the elderly should not eat too much. After eating, you can rub your stomach and help digestion slowly. If you live in winter, you should go to bed early and get up late and stay in the sun. Go to bed early to nourish human yang, get up late to protect human yin and balance human yin and yang. Pay special attention to keep the indoor temperature in winter. If the indoor temperature is too low, it will easily hurt the human yang, while if the indoor temperature is too high, it will easily lead to fatigue, exogenous diseases and other diseases. Knock your teeth thirty-six times before going to bed in winter night, and the same is true in the morning. Don't soak your feet in hot water immediately when you come back from going out on a snowy day. If you come back with a cold, you can't eat hot soup and food because your cold hasn't been solved. You must wait for a while. Get up in winter and wear clothes for a while. Long-term cold water gargling can eliminate tooth problems. The way to keep your teeth stable is to knock your teeth 300 times in the morning. Winter training should be based on the climate and physical conditions in different regions. When the climate is abnormal, you can do indoor activities in the morning, mainly static work. When the weather is clear, you can do outdoor exercise in the morning to adapt to the winter climate and enhance the cold resistance of the human body.