This Chapter is a dialogue from the Yellow Emperor's Classic of Internal Medicine, exploring the relationship between the kidneys, water, and disease within the framework of Traditional Chinese Medicine. It discusses the kidneys' role in water metabolism, explaining how imbalances lead to conditions like edema. The dialogue further details seasonal acupuncture principles, suggesting different treatment strategies based on the interplay of the five elements and the body's energetic flow. Finally, it describes specific acupoints used to address water and heat-related disorders.