There are two main types of dampness in the body, internal and external. External causes are due to dampness caused by living in a humid place for a long time, resulting in heavy dampness caused by external evil attacking the body. Internal dampness is caused by spleen deficiency, Chinese medicine believes that the spleen is the master of transportation and transformation, due to various reasons leading to spleen deficiency, transportation and transformation is not in order, water metabolism is out of order, there will be heavy dampness, often use the Chinese medicine to strengthen the spleen to dispel dampness, such as ginseng lingbaijusan, Jianshuwan, spleen pill, etc.. Whether it is caused by internal or external causes of heavy dampness in the human body, we should pay attention to improve the poor living and eating habits, improve the living environment.