This Chapter is a detailed translation of Chapter 23, "Treating Heat Illness," from the Yellow Emperor's Classic of Internal Medicine. It provides a comprehensive guide to diagnosing and treating various heat-related disorders through acupuncture, focusing on pulse diagnosis and sweating as key indicators of prognosis. The chapter outlines specific symptoms, corresponding acupuncture points and techniques (including the "59 needling techniques"), and differentiates treatable from untreatable cases, offering crucial insights into the classical Chinese medical approach to heat illness. The text also includes explanations of specific conditions like partial paralysis, flaccidity, and various heat-related complications. Finally, it concludes with guidelines for prognosis and treatment based on pulse and sweat observation.