Wang, female, 60 years old. The patient has a history of phlegm fluid retention disease. In the autumn of 1965, she experienced dizziness, blurred vision, chest pain, shortness of breath, palpitations in the epigastric region, head sweating, cold back, chest pain, cold hands and feet, anorexia, and dark circles under the eyes. Analysis of the condition revealed that water retention was stagnating below the heart, leading to reversal cold of the limbs. According to Article 356 of the "Treatise on Cold Damage Diseases": "In cases of cold damage disease with reversal cold and palpitations below the heart, it is appropriate to first treat the water retention by administering Poria and Licorice Decoction, and then treat the reversal cold. If not, the water will infiltrate the stomach, leading to diarrhea." The patient was treated with Poria and Licorice Decoction (Poria, Cinnamon Twig, Prepared Licorice Root, Fresh Ginger Rhizome). After taking 4 doses, the symptoms significantly improved: the hands and feet warmed up, the dizziness subsided, and the chest pain disappeared. As the patient was able to resume household chores, no further medication was administered.