This paper introduced Professor WANG Lie's experience in the treatment of children with allergic rhinitis by stages. According to the “cold enveloping fire” theory， it is believed that allergic rhinitis during attack period is caused by external cold and internal heat， with the core pathogenesis of cold enveloping the exterior and heat accumulating in the interior； the external cause is insecurity of the

wei

（卫） exterior， and the wind-cold invading the lung， while the internal cause is the heat accumulated in the speen-stomach， and upward in the lungs， making the lung failing to diffuse， and nose orifice discomfort. The corresponding treatment method should be releasing exterior， and consolidating the exterior to unblock the orifices， and self-made

Li Bi Formula

（利鼻方） in modification is suggested. In the remission period， the core pathogenesis is depletion of lung， spleen and kidney， manifested as susceptibility to external contraction due to healthy

qi

depletion， and disease recurrence as to repeated invasion by external pathogen. Correspondingly， it is appropriate to benefit the lung and fortify the spleen， supplement the kidney and consolidate the root， with self-made

Gufang Decoction

（固防汤） in modification.