Dampness arises because of two aspects: 1, external dampness, sometimes living in the wetlands for a long time, live in a particularly humid place, such as the South or live in the basement damp and cold, diet, such as eating more cool things. As well as wading in the rain did not change clothes in time, water work are prone to external dampness, resulting in external dampness stop gathering in the human body; 2, dampness can be generated from the internal, Chinese medicine says the spleen transportation of water and dampness, the spleen is the source of phlegm, so the generation of internal dampness can be attributed to the spleen and stomach. If the diet is fat, sweet, thick and greasy, it will cause the dampness to accumulate in the body and not be able to transport and transform it, and more dampness can produce phlegm-dampness. Dampness can also be generated if one’s yang qi is depleted and is insufficient to be able to transform drinks.