This paper summarized the clinical experience of AI Rudi in the treatment facial hormone-dependent dermatitis with the method of clearing heat and protecting

yin

. It is believed that the key pathogenesis is the heat toxin accumulation，

yin

depletion and collaterals obstruction. The clinical treatment should focus on “heat exuberance” and “

yin

depletion”. It is advocated that “half treatment is from heat and half from

yin

” is the general principle， and the treatment is staged. In the acute phase， the treatment is half from cooling blood and dispersing wind to dispel heat pathogen， and half from protecting fluid and moisturizing skin to strengthen

yin

； and the modified

Liangxue Xiaofeng Powder

（凉血消风散） could be used. In the chronic phase， half treatment is from clearing residual toxin to eliminate heat pathogen， and half from nourishing

yin

and unblocking collaterals to strengthen

yin

， for which

Xuanmai Ganju Decoction and Erzhi Pills

（玄麦甘桔汤合二至丸） can be used and modified according to the symptoms. At the same time， we should pay attention to the simultaneous internal and external treatment， and emphasize the importance of daily protection in the treatment of the disease.