Yan, male, over 1 year old. In September 1956, he suddenly developed high fever, vomiting, and diarrhea. A hospital treated him for acute gastroenteritis for three days, after which the vomiting and diarrhea stopped, but he became restless, thirsty, and had cold limbs. His mother brought him to Dr. Chen at our hospital for treatment.

Dr. Chen, considering the reversal cold of limbs after vomiting and diarrhea, diagnosed it as internal excess of pudendal coldness and prescribed the Middle-Regulating Decoction with cinnamon and aconite. Due to the urgency of the condition, he consulted me. Upon examination, although the child's hands and feet were as cold as ice, his chest was beating rapidly, his skin was hot to the touch, and his abdomen felt like a heated kang. I said: "At the onset of the illness, reversal cold of hands and feet would indeed warrant the use of the Middle-Regulating Decoction with cinnamon and aconite. However, three days into the illness, reversal cold of hands and feet should not be treated lightly with such a prescription. Moreover, the child's tongue is deep red, his urine is scanty and reddish, his stool is not efflux diarrhea but dark yellow and accompanied by urgency, and he frequently asks for cold drinks and is restless. This is yang pathogen reversal cold of limbs, and the Cold-Limbs Powder is appropriate." Dr. Chen, puzzled by the cold limbs, doubted the efficacy of the Cold-Limbs Powder. Just then, Dr. Peng arrived and was invited to review the case. Dr. Peng also agreed that the Cold-Limbs Powder should be used urgently. The medicine was administered, and after one dose, by midnight, the child's hands and feet had warmed, he was no longer restless, and could sleep peacefully. Two more doses of the same medicine led to a full recovery.