I. The Macroscopic Nature of Traditional Chinese Diagnostic Differentiation

I. The Macroscopic Nature of Traditional Chinese Diagnostic Differentiation

Diagnostic differentiation and treatment is a hallmark of the traditional Chinese medical system and represents the very essence of Chinese medicine as a whole. The foundation of diagnostic differentiation lies in the four diagnostic methods—inspection, auscultation and olfaction, inquiry, and palpation—and the method itself relies on logical reasoning. Throughout the process of diagnostic differentiation, physicians fully utilize their sensory abilities and the analytical capacity of the cerebral cortex. Looking back at the history of the development of traditional Chinese medicine, we can easily trace the origins of this tendency.

The development of traditional Chinese medical scholarship can be traced back to Bian Que in the 4th century BC and extends to modern medical scholars such as Xiao Longyou and Pu Fuzhou. Their practical experience and academic ideas have always been rooted in agriculture and handicrafts. Throughout history, traditional Chinese medical scholars have never had access to the sophisticated tools provided by large-scale industry for medical research. Consequently, the traditional achievements in the field of traditional Chinese medicine have largely stemmed from macroscopic observation and judgment of the external manifestations of disease. As a result, tongue color, pulse condition, patients' subjective symptoms, and certain external physical signs have become the primary basis for diagnosing illness. For example, the four diagnostic methods, eight principles, qi-blood-phlegm-fire, five movements and six energies—summarized by our predecessors—have collectively formed a distinctive system of diagnostic differentiation in traditional Chinese medicine. This system has indeed played a tremendous role in humanity's understanding and treatment of disease and continues to do so today. However, since human senses can only observe the external manifestations of disease, the essence of the principle "treatment must seek the root cause" is actually logical reasoning based on syndrome differentiation and etiology analysis, while direct insight into the internal changes of disease remains elusive. Over the years, medical scholars have accumulated many vivid reasoning methods through extensive clinical practice, such as analogy and similarity, and the principle of like attracting like, in an effort to form accurate mental images of the true nature of disease. Although these mental images lack a solid experimental research foundation, they originate from clinical practice and are underpinned by practical experience, thus holding universal guiding significance for clinical practice in traditional Chinese medicine.