The purpose of this book is to guide Chinese Herbalist and Acupuncturist practitioners or other health practitioners to study internal diseases. Topics of study are diseases, signs, symptoms, patterns, condition, situation, abnormality and degeneration organs and tissues. The study of diseases includes definition, classification, main symptoms, symptoms characteristics, how to analysis, evaluation information and explanation, pathogen, pathogenesis, location, direction, property, condition, situation, degree, stages, position, inducement, complication, progression, main pattern, remedies principle and solutions, precaution, and prevention. Also, included are different methods to study opposite condition and situation in common practice. Readers will gain knowledge and understanding the internal diseases from the Chinese Herbal Remedies methods and viewpoints.