Analysis of illness: It is summer in dog days, and the yang is strong. At this time, in order to adapt to the weather, the human body is in a state of "excess of yang outside, internal deficit", sweating increases, and the summer heat is pressing, which often leads to the summer physical characteristics of insufficient yang. At this time, if you are too greedy for cold and eat cold because of heatstroke prevention, it will easily lead to excessive internal cold and make the yang in the body worse. Suggestion: Ancient scholars believe that. Dampness in summer is very harmful to the spleen, and bitter food has the effect of purging dryness, so it is not advisable to eat more, so it is advisable to eat more sweet and cold or sweet and cold in daily diet. Moreover, in summer, the heart returns to the heart, but the heart likes to be cold, so it is more appropriate to eat sour food, such as pineapple and watermelon.