Quietly, we have entered the second of the 24 solar terms: rain at 0: 42 on February 19, 2022. 24 solar terms: rain. "In the first month. Water falls from the sky, and beginning of spring belongs to wood. However, if it comes from wood, it will also come from water, so beginning of spring has succeeded in raining. If the east wind melts, it will disperse into rain. " That is to say, after beginning of spring, the summer fire hidden underground in autumn and winter last year began to rise. When it rained, the weather turned from cold to warm, and everything sprouted from hiding, and then rose to the ground through the fright and vernal equinox. The so-called rain, as the name implies, is to start raining more. Why? Because the weather is getting warmer, the atmosphere is transpiration, the weather is falling, a spring rain is warm, the cold is fading, and the spring is getting stronger. However, people living in it are vulnerable to the evil of cold and dampness because of the changeable weather, which is both warm and cold at first and rainy continuously. As far as the correspondence of human viscera is concerned, under the influence of wind and wood, human health is the weakest, followed by the internal organs, and the third is the internal organs. That is to say, from the point of view of the five elements producing grams, mu ke soil, so the spleen is affected by evil; Zang-fu organs belong to wood, so liver is the second; Jin Kemu, so the lungs will be affected by evil. "Internal organs are solid diseases, while other organs are virtual diseases."