This Chapter from The Yellow Emperor’s Classic of Internal Medicine details ancient Chinese medical understandings of abscesses and sores. It explores the etiology of these conditions, linking their development to imbalances of blood and qi, and the body's relationship to celestial and terrestrial cycles. The text provides a classification of abscesses based on location and prognosis, offering treatments and predicting outcomes. Distinguishing characteristics between abscesses and sores are described, highlighting the depth of tissue involvement and potential impact on internal organs. Finally, the text emphasizes the importance of timely intervention to prevent fatal consequences.