In Chinese medicine culture, foot bath therapy has a long history. It originated in ancient China and is the accumulation of knowledge and experience in long-term social practice. It has a historical tradition of more than 3000 years. The ancients once had many classic records and descriptions of foot bath: "Washing feet in spring, the sun rises and takes off;" Washing feet in summer can dispel summer heat and dampness; Wash feet in autumn, moisten lungs and intestines; Wash your feet in winter, and Dantian is warm. " Su Dongpo said, "The hot foot bath didn't work well at first, but it has accumulated for more than a hundred days and its effect is immeasurable. It is a hundred times more effective than taking medicine. " He also wrote in the poem: "My master advised me to wash my feet and sleep, so I wouldn't smell the bells and drums when I fell on the bed." Lu You said, "It's so fast to wash your feet and sleep. Your little grandson is gradually getting rid of this soup. "The founder of the Qing Dynasty's external treatment method said in the Theory Parallel Prose:" When you are lying on your feet, all three yin starts from your feet, which means cold and enters from the heart of your feet. The reason why you are warm is that the yin is cold. "