This Chapter from the Yellow Emperor's Classic of Internal Medicine details ancient Chinese medical diagnoses and treatments for madness (癫疾) and mania (狂疾). The text describes various symptoms, including visual disturbances, emotional volatility, and physical manifestations. Treatment strategies focus on acupuncture and bloodletting at specific points along meridians, along with moxibustion. Different types of madness and mania, each with unique symptoms and prognoses, are differentiated and addressed. The severity of the condition guides treatment decisions, with some forms considered incurable.