This Chapter from The Yellow Emperor’s Classic of Internal Medicine details a dialogue between the Yellow Emperor and Qi Bo concerning the diagnosis and treatment of scrofula, a swelling in the neck and armpits. Qi Bo attributes the condition to toxic qi, explaining its origin in the zang-organs and its manifestation as swellings. He describes a treatment method involving acupuncture to eliminate the toxic qi and alleviate alternating sensations of cold and heat. Finally, Qi Bo provides a prognostic method based on observing the patient's eye blood vessels to predict the time until death.