Allergic rhinitis is one of the most common skin disorders in pediatrics, and the use of Western medicine is prone to recurrence. Professor Sanggao summarized clinical experience of menr yearsand proposed the academic idea of "harmony and stability theory", which implies harmony and fluency. Stability, which means stability and steady state, refers to the coordination of the internal organs, Yin and Yang of the human body, so that the opposing parties such as cold and heat, exterior and interior are in a harmonious state and maintain steady state. The general principle is to regulate their disharmony and imbalance, and based on this, it is proposed to treat this disease in stages. In the acute attack stage, the treatment should be based on harmony with the positive and negative, in order to achieve the steady state of external and internal pathogens. In clinical practice, Tongqiao Fang is often used to add or subtract. During the remission period, the treatment should be coordinated with the lungs and spleen to achieve a stable state of lungs and spleen Qi mechanism and smooth water flow. In clinical practice, Tongqiao Fang and Liujunzi Decoction should be used with modifications. During the prolonged treatment period, it is necessary to balance the constitution and achieve a steady state of clearing away pathogenic factors, desensitization, and visceral harmony. In clinical practice, Liujunzi Decoction and Yupingfeng Powder are often used with modifications; Staged treatment combined with internal and external treatment has a significant therapeutic effect. Attach a case for verification.