Objectives The purpose of this case study is to report the effect of concurrent administration of Danguieumja-gagambang and external treatments on childhood psoriasis. Methods The subject is a child with psoriasis. This patient was treated with oriental herbal medicine (Danguieumjagagambang) and external treatments. The improvement of the skin condition is observed by Psoriasis Area and Severity Index (PASI) score. Results After the treatment, the symptoms of psoriasis were relieved. PASI score of this child went down from 4.7 to 0. Conclusions This study showed that concurrent administration of Danguieumja-gagambang and external treatments can be an effective choice for psoriasis.