Abstract
Nail psoriasis is common in adult psoriatic patients and it causes serious psychological and physical distress. Topical treatments such as corticosteroids, calcipotriol, retinoids, and 5‐fluorouracil have limited efficacy and are not without side effects. Relative effective systemic treatments are ciclosporin, methotrexate and acitretin, all of which have a serious toxicity potential. Biologics in the treatment of nail psoriasis have been the subject of recent research, but their cost‐effectiveness is questionable. We present a case of psoriatic nail disease which improved greatly on treatment with fumaric acid esters (FAE).