If there are indications for purgation, the purgative method should be applied according to the child's age and the deficiency or excess of their constitution, so as to prevent the development of *Gan* syndrome (chronic malnutrition in children). For early-stage cases with insufficient body fluids, the stomach fluids should be generated; *Baizhu San* (Atractylodes Macrocephala Powder) is the primary formula, and its efficacy is enhanced with frequent use. [Yang] stated: Heat patterns are treated with cooling methods, cold patterns with warming methods, and mixed cold-heat patterns with combined warming and cooling approaches; this is the key principle. In *Re Gan* (Heat-type Gan), the pathology is mostly external, manifesting as redness and ulceration under the nose, wet and itchy head sores, heat sensation in the five centers (palms, soles, and chest), restlessness with clothes kicked off and coarse breathing, thirst craving for cold water, irritability with lying on the ground, abdominal heat with cold feet, and alternating tidal fever—all are signs of Heat-type Gan. In *Leng Gan* (Cold-type Gan), the pathology is mostly internal, characterized by irregular stool color with greenish-white froth, weak limbs, swollen eyes, and a sallow complexion. Another presentation involves restlessness, thirst, and lying on the ground, resembling heat symptoms, yet accompanied by anorexia and continuous loose stools; this is also classified as Cold-type Gan. If diarrhea is profuse with pus and blood, leading to progressive emaciation, it is termed *Leng Re Gan* (Mixed Cold-Heat Gan). Generally, the etiology of *Gan* syndrome stems from deficiency; Heat-type Gan represents heat within deficiency, while Cold-type Gan represents cold within deficiency. When treating heat, one must not recklessly use exterior-releasing methods or excessive cold herbs; when treating cold, one must not employ harsh warming or sudden tonification. Therefore, Qian Yi further stated: Children are prone to...