如果有可下之证，应根据患儿年龄大小和体质虚实来使用泻下法，这样就不会发展为疳积。初病津液不足者，应当滋生胃中津液，以白术散为主方，用法越多越妙。〔杨氏〕认为：热证用凉药治疗，寒证用温药治疗，寒热错杂证用温凉并用的方法，这是治疗的要点。热疳，病位多在外，表现为鼻下红肿溃烂，头部疮疡湿痒，五心烦热，掀开衣服呼吸粗重，口渴想喝冷水，烦躁不安卧于地面，腹部发热而脚部发冷，潮热往来不定，这些都是热疳的表现。冷疳，病位多在内，大便颜色无常，夹杂青白色泡沫，肢体软弱无力，眼睑浮肿面色黧黑。还有一种证候，躁动口渴卧于地面，看似有热象，但饮食不进，滑泄不止，这也属于冷疳。如果腹泻多伴有脓血，日渐消瘦虚弱，这称为冷热疳。大抵疳积的发病，都是由于虚损所致，热疳是虚中的热，冷疳是虚中的寒，治疗热证不可妄用解表或过用寒凉，治疗寒证不可峻猛温补，所以钱乙又说：小儿容易（患病/变化）……
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...