Liang, male, 28 years old, diagnosed with epidemic encephalitis B. The illness has lasted for six days, during which he has continuously taken Chinese medicinals for clearing heat, removing toxin, and nourishing yin, but the tendency of the disease has only increased. During the consultation, his body temperature was as high as 40.3℃, with a deep and rapid pulse manifestation, slight hardness in abdominal distension and fullness, continuous hiccup sounds, red eyes that do not close, without sweating, restless movements of hands and feet, dysphoria and restlessness, showing signs of impending madness, unconsciousness with delirious speech, slight coldness in the limbs, and diarrhea yesterday with pure greenish-black water. Although the pathogenic factors are entrenched in the yangming, showing signs of heat retention with watery discharge, it has not yet reached a state of severe fullness. Moreover, the tongue coating is greasy and not deeply yellow, so Major Purgative Decoction is not suitable. Instead, the method of Minor Purgative Decoction was used to mildly harmonize. After taking the medicine, the hiccups stopped and bowel movements normalized, sweating occurred and the coldness in the limbs receded, consciousness returned and the fever subsided, all symptoms suddenly improved. Then, tonifying yin and harmonizing stomach medicinals were used to regulate and achieve a cure.