Objectives : The purpose of this study is to report the effect of Fermented Yungyo Keumeunhwa Extract External treatment Liquid on Seborrheic Dermatitis. Methods : Four Seborrheic Dermatitis patients on the face of each Diluted Yungyo Keumeunhwa Extract External treatment Liquid patch was 10 minutes. Results : The Fermented Yungyo Keumeunhwa Extract External treatment Liquid was effective on alleviation of symptoms like flare, scale, uredo and pricking on Seborrheic Dermatitis. Conclusions : The result indicate that Fermented Yungyo Keumeunhwa Extract External treatment Liquid has an available effect on Seborrheic Dermatitis, and authors consider that the additional clinical studies are needed to verify the effectiveness of monotherapy.