The Ehlers-Danlos syndromes (EDS) are heritable connective tissue disorders affecting the quality of collagen in every part of the body. They were once considered to be very rare and only seen by rheumatologists. There are 13 types of Ehlers-Danlos syndrome, most of which are indeed rare. However, the hypermobile type of EDS (and associated hypermobility spectrum disorder) is thought to be common and this toolkit will focus primarily on this type, although many of the clinical signs and symptoms discussed can also appear across the other EDS types.
