Many publications have addressed the medical complications of tattoos, but to our knowledge there are no reports of their use to alert people in our field of potentially dangerous conditions. We present a new way to inform oral and maxillofacial colleagues about patients with a history of malignant hyperthermia (or any other life-threatening medical problem) and discuss the potential advantages and disadvantages of medical alert tattoos. (C) 2016 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.