[Fixed food eruption caused by liquorice]

Abstract

Introduction: Fixed drug eruption is a characteristic cutaneous adverse reaction that recurs at fixed localisations. It is due to medical drugs. However, food may sometimes be responsible for a similar eruption, known as "fixed food eruption". We report a case of fixed food eruption due to liquorice.

Case report: A 22-year-old woman presented with liquorice-induced fixed drug reaction. Topical challenges remained negative both at previously affected sites and in unaffected skin. Therapeutic re-exposure to liquorice confirmed the diagnosis.

Discussion: To our knowledge, we report the first case of food drug reaction caused by liquorice.