Prof. ZHU Zongyuan has special understanding for infantile exogenous fever. He holds that the treatment of infantile exogenous fever includes in two steps. During febrile stage

the cause is dampness-heat

and the treatment principle should be focused on eliminating pathogens

thus

Haoqin Qingdan Tang（ 蒿芩清胆汤） should be used. After fever remission

the treating principles are nourishing Yin-engendering liquid

in combination with eliminating the remaining pathogens. This article discusses the etiology and pathogenesis of the infantile exogenous fever

and Chinese herbal prescription for this disease. In addition

the article selects some typical cases to illustrate the clinical application of these two principles.