As the saying goes, “The day is in the morning, and the year is in the spring”. Spring is the most beautiful season of the year. However, it is also the season when “all the grasses sprout and all the diseases take hold”. According to the theory of Chinese medicine, spring is the time when yin and yang grow, and the natural yang energy starts to grow. In Chinese medicine, spring is a process of change of yin and yang. According to the theory of “unity of heaven and man” in Chinese medicine, the health of the human body closely corresponds to the changes in the natural world. In this process, human qi, blood, yin and yang also change with the external seasonal changes, human physiological functions start to be active, activities start to increase, and metabolism becomes more and more vigorous. At the same time, yang energy starts to develop, qi and blood gradually become active, human skin couples become loose and pores open and close. At this time, the body’s yin and yang are in dynamic change, and the climate is very unstable in spring when it is still warm and cold, so healthy people can adapt themselves to the environment quickly and generally do not need to adjust to the tonic. However, people with old illnesses are not so lucky in this changing season, and old illnesses are very likely to recur. At this time, for such patients and people who are weak after illness, they can improve their body’s resistance through proper tonic, so that their bodies can recover and play a role in preventing diseases. So, how to take tonic in spring? In spring, the grass and trees sprout, and all organs of the body wake up from their winter “lazy” state. Starting from the beginning of spring, the heat accumulated in the liver, stomach, lungs and other internal organs of the human body slowly emits, and internal heat appears. Therefore, the spring tonic should be based on the principle of flat tonic, not just use warm tonic, so as not to increase the temperature in the spring and increase the internal heat of the body to damage the body’s vitality. Preferred dietary supplements. Spring diet should be flat tonic, focus on nourishing the liver and spleen. According to Chinese medicine, liver and spring correspond to each other in the five elements, and spring is the time when liver wood is in season. The physiological characteristics of the liver are like the spring trees, the main body Yang Qi rise. The sour taste enters the liver, which is acidic and astringent, and is not conducive to the growth of liver wood; the sweet taste enters the spleen, which is most suitable for the spleen, which is healthy and orderly, and helps the growth of liver qi. Therefore, the spring tonic should be as the famous Tang Dynasty physician Sun Simiao said: “Save acid and increase the sweetness to nourish the spleen.” For those who have obvious deficiencies of Qi, blood, yin and yang and cannot correct the deficiencies by dietary supplements alone, they should take medicinal supplements under the guidance of herbalists. The medicine is based on sweet and flat tonic, which can regulate the body’s yin and yang, restore the balance of the body, and make the body healthy. Spring health food: spring health to choose general tonic food is appropriate, such as chicken, eggs, lean pork, red dates, etc.. Not only can improve the “lethargy” of the body, but also can enrich the physical strength. However, for people who are obviously weak, they need to choose appropriate tonic herbs to nourish themselves, such as American ginseng, longan meat, party ginseng, etc. Spring is a good season for allergic diseases because of the large amount of pollen in the air when flowers are blooming. If you have chronic diseases or allergies, you must avoid taking “hairy foods” in spring, such as shrimp and crab, otherwise old diseases are likely to recur. The spring tonic diet is also based on the principle of flat tonic, not just using warm tonic, the dietary principle is to choose the higher calorie staple food, and pay attention to the supplementation of sufficient protein. Diet in addition to rice and flour grains, can add some beans, peanuts, dairy products, etc.. For example, breakfast: 1 bag of milk (about 250 ml), 100 grams of staple food, small vegetables in the right amount; lunch: 150 grams of staple food, 50 grams of lean pork, beef and lamb (or soy products), 200 grams of green vegetables, egg soup or broth in the right amount; dinner: 100 grams of staple food, 50 grams of eggs and fish meat (or soy products), 200 grams of green vegetables, 1 bowl of bean porridge.