What are the eight principles? Please read the following explanations in detail:
Eight types of syndromes are yin, yang, exterior, interior, cold, heat, deficiency and excess. An outline of TCM syndrome differentiation. As early as the Eastern Han Dynasty. Zhang Zhongjing's "Treatise on Febrile Diseases and Miscellaneous Diseases" has included the contents of the eight cardinal principles in terms of syndrome differentiation. It is also a good idea to use the eight-principle dialectics to analyze the articles on typhoid fever. "Compendium of Materia Medica" quotes Kou Zongshi: "There are eight essentials, one is deficiency, the second is excess, the third is cold, the fourth is heat, the fifth is evil, the sixth is right, the seventh is internal, and the eighth is external." "Six Essentials of Medicine" ": "There are eight great methods for treating diseases, namely yin, yang, exterior, li, cold, heat, deficiency and excess." "Jingyue Complete Book". "Chuan Zhong Lu": "When diagnosing and treating diseases, one must first examine yin and yang, which is the guideline of medical science." Also: "Six changes are caused by cold, heat and deficiency on the outside and inside.": Cheng Zhongling's "Medicine Insight": "There are general symptoms of disease. Essentials are just eight characters: cold, heat, deficiency, excess, exterior, interior, yin and yang. "Generally speaking, exterior and interior identify the depth of the disease, cold and heat identify the nature of the disease, deficiency and excess identify the rise and fall of evil and righteousness, and yin and yang. The program that governs the other six principles. The exterior, heat, and excess are mostly yang; the interior, cold, and deficiency are mostly yin. Clinically, the eight principles are used to analyze and summarize the disease and syndrome, and determine the location and nature of the disease and the relationship between good and evil in the disease process, as an important basis for treatment.