Systematic understanding of "flaccidity syndrome" disease in traditional Chinese medicine began with the

Huangdi Neijing

which explains very detailedly compared with other diseases. Based on text tracing

combined with medical explanation and clinical thinking

this paper further summarizes the definition and development of "flaccidity syndrome". By combining the origin and flow of flaccidity syndrome in

Huangdi Neijing

with related descriptions in ancient literature

we point out that the occurrence of "flaccidity syndrome" starts from the lung

is related to the stomach

and is caused by the lung scorched by heart. The etiology of "flaccidity syndrome"

which is injured by heat

is closely related to dampness

and the onset is mainly due to the dryness of meridians. The change in flaccidity syndrome

starting from the upper body

is related to the lower body

and eventually leads to exhaustion if not treated. Syndrome differentiation and treatment of flaccidity is based on "taking Yangming alone" with the method of "clearing heart fire and nourishing kidney water". Clinical syndromes also need to be treated by targeting "flaccidity syndrome with symptoms"

or later flexible "flaccidity syndrome with arthralgia"

in order to correct the causes and symptoms of flaccidity.