EDS stands for Ehlers Danlos Syndrome. It is a heritable connective tissue disorder. There are lots of types of EDS, each with distinctive features, for example Hypermobility Type, Classic Type, Vascular Type.
This year, in March 2017, the diagnostic criteria changed. I have found this change both distressing and confusing. And, as I’m afraid I still don’t understand it fully, rather than attempt to explain the new criteria, I’m going to direct you here.