Atopic dermatitis is a common chronic,relapsing,inflammatory skin disease;however,its pathogenesis remains unclear.The theory of"clear-turbid interference"originates from the Inner Canon of Yellow Emperor and refers to a pathological condition in which clear yang and turbid yin intermingle,and qi movement becomes disordered.This paper elucidates the theoretical connotation of"clear-turbid interference"and its core mechanism in triggering atopic dermatitis,as well as the role of the"gut-skin axis"in atopic dermatitis development.Internal dampness-turbidity and disharmony between ying and wei constitute the core pathological mechanisms linking clear-turbid interference to atopic dermatitis.Treatment for different stages and syndromes should be guided by syndrome differentiation.For example,for spleen deficiency with a dampness syndrome in subacute or chronic stages,Chushi Weiling Decoction may be used to fortify the spleen,eliminate dampness,lift the clear,and downbear the turbid.For patterns with prominent heat manifestations,such as dampness-heat immersion or heart fire with spleen deficiency,bitter-cold dampness-drying herbs can be added on this basis.For wind-dampness-heat accumulation in the acute stage,Mahuang Lianyao Chixiaodou Decoction can be used to release the exterior,expel pathogens,and harmonize ying and wei.In cases of spleen deficiency with blood dryness or liver-kidney insufficiency during the chronic stage,in addition to nourishing yin to moisten the skin and tonifying the liver-kidney,wind-medicinals should also be employed to open the sweat pores and promote qi movement.These approaches restore the physiological state without clear-turbid interference while regulating intestinal flora,providing new approaches and perspectives for integrating traditional Chinese and Western medicine in treating atopic dermatitis.

Atopic dermatitis is a common chronic,relapsing,inflammatory skin disease;however,its pathogenesis remains unclear.The theory of"clear-turbid interference"originates from the Inner Canon of Yellow Emperor and refers to a pathological condition in which clear yang and turbid yin intermingle,and qi movement becomes disordered.This paper elucidates the theoretical connotation of"clear-turbid interference"and its core mechanism in triggering atopic dermatitis,as well as the role of the"gut-skin axis"in atopic dermatitis development.Internal dampness-turbidity and disharmony between ying and wei constitute the core pathological mechanisms linking clear-turbid interference to atopic dermatitis.Treatment for different stages and syndromes should be guided by syndrome differentiation.For example,for spleen deficiency with a dampness syndrome in subacute or chronic stages,Chushi Weiling Decoction may be used to fortify the spleen,eliminate dampness,lift the clear,and downbear the turbid.For patterns with prominent heat manifestations,such as dampness-heat immersion or heart fire with spleen deficiency,bitter-cold dampness-drying herbs can be added on this basis.For wind-dampness-heat accumulation in the acute stage,Mahuang Lianyao Chixiaodou Decoction can be used to release the exterior,expel pathogens,and harmonize ying and wei.In cases of spleen deficiency with blood dryness or liver-kidney insufficiency during the chronic stage,in addition to nourishing yin to moisten the skin and tonifying the liver-kidney,wind-medicinals should also be employed to open the sweat pores and promote qi movement.These approaches restore the physiological state without clear-turbid interference while regulating intestinal flora,providing new approaches and perspectives for integrating traditional Chinese and Western medicine in treating atopic dermatitis.