Guided by the theory of "disease caused by latent pathogen", combined with clinical practice, it is proposed that allergic cough is caused by "latent pathogens". The basic treatment method is "promote the flow of lung Qi" "heat clearing and pathogenic expelling method" to eradicate these factors from the lungs and lung channel of Hand-Taiyin, "Regulating Qi and promoting blood circulation" to eliminate phlegm and stasis. Addressing both symptoms and root causes, shorten the duration of illness, minimize recurrent episodes, and yield remarkable therapeutic effects in clinical practice.