Based on"Wind-pathogen injury Wei Qi"theory to explore treatment of Recurrent Aphthous Ulcer
"Wind-pathogen injury Wei Qi"theory can guide a variety of diseases,and the cause of the formation of these diseases is the damage of Wei Qi caused by external factors.Based on"Wind-pathogen injury Wei Qi"theory,we think"wind evil"is the direct cause of RAU in oral microenvironment.Deficiency of Wei Qi and loose oral mucosa are the key to the occur-rence of RAU.Treatment of it should notice the change between the"Wind-pathogen"and"Wei Qi".We should pay attention to remove the wind-pathogen and the pathological products,and strong Wei Qi and oral mucosa.