The Yellow Emperor's Classic of Internal Medicine, specifically Chapter 42, explores the nature and effects of wind in traditional Chinese medicine. The text details various wind-related illnesses, their symptoms, and diagnoses, distinguishing between internal and external manifestations. Different types of wind are categorized based on affected organs and seasons. Diagnostic methods are described, focusing on observing complexion changes in specific areas of the body. The dialogue format between the Yellow Emperor and Qi Bo provides a clear explanation of the theory and practice surrounding wind illnesses.