Based on an analysis of the clinical manifestations of the syndrome of invasion of pleurodiaphragmatic spaces by pathogens,the ingredients of Dayuan Decoction,and the progression of the syndrome,the authors believe that the syndrome belongs to the syndrome of damp-heat in the spleen and stomach,caused by invasion of damp-heat into the spleen and stomach,with more dampness than heat.

The study on traditional Chinese medicine (TCM) of fuxie theory shows TCM concern on“potential health hazards”proposed by World Health Organization.

The theory of Fuxie is an important part of TCM.

After explored the incubated diseases in TCM theory and its developed courses,we put for- ward its core point.

After explored the incubated diseases in TCM theory and its developed courses, we put forward its core point.

Traditional theory about incubated diseases tells us that they have several essential features, such as those incubated factors invading human\'s body from certain outside environment, and ambushing in human\'s body for a certain long time but not causing obvious sickness, then they bursting out from certain place of human\'s body to both surface and core in different ways.