The source of phlegm is the pathological product formed by the spleen and kidney’s metabolism disorder of water and fluid, clear and thin, thick and turbid as phlegm, mainly due to the body’s cold, cold, chronic disease consumption, poor diet or organ dysfunction, loss of qi and fluid metabolism, disorder of water and fluid metabolism, and the manifestation of phlegm-drink formed by the stagnation of semen. It is closely related to the function of the spleen of the body, when the body has a spleen deficiency, the production of dampness will cause water metabolism disorders, the formation of phlegm and drink performance. It is also directly related to the lungs, kidneys and water-liquid metabolism of the three jiao. When phlegm-drinking occurs in the body, it should be regulated and treated by strengthening the spleen and promoting water-liquid metabolism.