Allergic contact dermatitis caused by isobornyl acrylate when using the FreeStyle ® Libre.

We present the case of an 8-year old girl with type 1 diabetes, who developed severe allergic contact dermatitis by using FreeStyle® Libre. A patch test was performed by a piece of the adhesive part of the sensor of the FreeStyle® Libre, and subsequently by using the potential contact allergens in the sensor, isobornyl acrylate (IBOA). She reacted positively to the adhesive part of the sensor, and also reacted positively to IBOA with three different concentrations, 0.1%, 0.05% and 0.01%, over a 48-hour, 72-hour, and 7-day periods. The FreeStyle® Libre is a useful and less invasive device that can be used for continuous glucose monitoring in patients with diabetes. In contrast to the remarkable advantages, allergic contact dermatitis caused by IBOA in the adhesive part of FreeStyle® Libre is one of the potential adverse events. This article is protected by copyright. All rights reserved.