To explore the origin and development of Hunan Ouyangs clinical thinking on Miscellaneous Diseases.The founder of Hunan Ouyangs miscellaneous diseases genres emphasized on both cold and warm syndromes and used comparative analysis.The first generation of its successors developed a triple therapy of diagnosis and treatment by combining disease,syndrome and symptom together on the basis of clarifying main symptoms with three procedures,differentiation with three types and twenty-one sub-types symptoms and treatment from symptoms.The second ge...