Abstract
This article aims at clarifying the formation and accumulation of the "phlegm" in the body. If the phlegm can't be dispelled, it would do great harm to the body health in many aspects, even leading to various diseases which are complex and hard to cure. "phlegm blocking the orifices of the heart", "Gi(氣) activities blocking", "the blood vessels choking", "muscular striae[肌腠] overflowing", " tumor accumulated", "inveterate phlegm loss the path", are the outstanding pathogenic characteristics of the "phlegm". Ancient and modern physicians accumulated rich experiences on preventing and treating the phlegm diseases. Those are worth excavating, organizing and clarifying deeply for the prevention, diagnosis and treatment of the phlegm diseases efficiently.
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