The body of this book is divided into two parts. Part I consists of 47 common internal medical conditions (including addendums) presented according to the traditional medical practice of differentiation and treatment. Derived from the analysis of etiology, pathogenesis, diagnosis and differential diagnosis, patterns for the selected condition are differentiated and identified, and guidelines for treatment are provided. Part II presents 37 Western medical conditions for which TCM treatment has proven effective. The approach in Part II integrates Western medical diagnosis and TCM differentiation of the condition. Based on the analysis of the primary symptoms, the characteristics and progressions of the patterns are elaborated, and appropriate TCM treatment measures are suggested. Current TCM studies for each condition are also introduced in Part II. It is not by omission, but to prevent dissemination of misleading information, that those Western medical conditions with few or no proven TCM therapies are excluded from Part II. Some medical conditions for which both Western medicine and TCM share common concepts are referred to the corresponding chapters in Part I for a comprehensive discussion of the TCM perspective. The contents of Part II are designed to meet the great demand for Chinese medicine from a large population suffering from Western medical diseases, and to create a new path for academia while providing an opportunity for internal medicine in clinical actualization.