There are many different versions of Ehlers-Danlos Syndrome and a whole slew of symptoms. They almost always include hyper-flexibility of the joints and the skin as well.
There are some pretty serious issues, though, like very low bone density, chronic degenerative joint disease and an early onset of osteoporosis. This disease can also cause varicose veins, extreme nearsightedness, and very life threatening vascular issues.
There are no cures for any forms of this disease, which is genetic, but treatment of individual symptoms has had some success