Huangdi Neijing said: "The summer of February and March is called a complex show. When heaven and earth meet, everything is flashy. Lying at night and getting up early, I am insatiable about the sun, which makes me angry and makes Huaying show off his anger. " It means that the three months of summer are the season when everything in nature flourishes and grows. People should adapt to the characteristics of summer, go to bed late and get up early, don't complain that the days are too long, don't be angry and don't get excited, but let their emotions be as rich as plants in nature, let their bodies sweat moderately, and let the yang in their bodies be vented in time.

Xia San needs to supplement her diet every month. "Lu's Spring and Autumn Annals" pointed out: "All food is not strong and thick. There is no strong taste and heavy wine. " From the point of view of nutrition, light diet plays an irreplaceable role in health preservation. Diet should not be too ripe and too sweet. What is important in summer is to nourish the heart, and the heart is "fire dirty". Eat less hot food, eat more sweet and sour food to clear away heat and toxic materials, diminish inflammation and purge fire, increase body moisture and supplement body consumption. Traditional Chinese medicine believes that red foods, such as tomatoes and watermelons, can help the human body replenish blood and generate blood, and remove blood stasis in blood vessels. In addition, summer is the rainy season, summer and humidity are in season, and the appetite is poor. It can be used as a food for nourishing spleen and stomach, eliminating dampness and pathogenic factors, and being harmonious but not greasy.