Ehlers-Danlos syndrome is a rare hereditary disease of the connective tissue which can present oral manifestations. A brief history of the disease is presented along with the epidemiology and characteristics of the 8 main phenotypes of the syndrome. The article also describes the case of a 12-year-old patient presenting with hypermobility of the temporo-mandibular joint and capillary fragility, and highlights the precautions to take when treating patients with this syndrome.