This Chapter from the Yellow Emperor’s Classic of Internal Medicine discusses a condition involving intestinal parasites causing lower abdominal obstruction. Qi Bo, a physician, explains that emotional imbalance, dietary indiscretions, and temperature extremes lead to cold fluids accumulating in the intestines, chilling the parasites and causing them to obstruct the flow of qi. Treatment involves acupuncture, carefully targeting the abscess, followed by heat therapy to weaken the pathogenic qi and promote drainage. Dietary and lifestyle restrictions are also recommended to support healing. The dialogue between the Yellow Emperor and Qi Bo details both the cause and the treatment for this ailment.