Novel diabetic devices are being developed to help manage diabetes and improve the quality of life of patients with diabetes. Both insulin pumps and glucose monitors are becoming increasingly convenient, long-lasting, and discrete for patients, but this often requires the use of strong external cutaneous adhesives and increased contact time with the skin. As a consequence, these devices have been associated with a variety of dermatologic reactions, namely, irritant and allergic contact dermatitis. Some of these reactions can be severe, precluding the use of these devices, which puts patients' long-term health at risk. Herein, we review the history of diabetic devices and reported cutaneous reactions to diabetic devices and commonly cited allergens.