Zhang, male, 33 years old, farmer. In the summer of 1975, he suffered from dysentery, fever, and abdominal pain, with more than 10 bowel movements a day. By the second day, it turned into diarrhea with undigested food, cold hands and feet, pale complexion, weakness in limbs, dysphoria and restlessness, and a floating and slow pulse. This was identified as diarrhea due to exterior heat and interior cold. According to Article 225 of the "Treatise on Cold Damage Diseases": "A floating and slow pulse, exterior heat and interior cold, and diarrhea with undigested food are treated with Cold-Extremities Decoction." The original Cold-Extremities Decoction (composed of Prepared Liquorice Root, Dried Ginger, and Aconite Lateral Root) was administered. After taking it, the abdominal pain ceased, the frequency of diarrhea decreased, and the hands and feet warmed up. After taking two more doses, sweating occurred, the fever subsided, the diarrhea stopped, appetite returned, and he recovered.