Treatment of tinea capitis consists of a 5-week course of griseofulvin. A 1-week course of a systemic corticosteroid may be considered in addition to griseofulvin therapy to accelerate the subsidence of inflammation in kerion lesions. Kerion is an inflammatory form of tinea capitis which may progress rapidly into a fulminant infection if untreated. This case report underscores the need for prompt recognition and appropriate treatment of this disorder.