Ehlers-Danlos Hypermobility Syndrome
Ehlers-Danlos syndromes (EDS) are a group of rare inherited conditions that affect connective tissue. Connective tissues provide support in skin, tendons, ligaments, blood vessels, internal organs and bones. Joint hypermobility syndrome is when you have very flexible joints and it causes you pain (you may think of yourself as being double-jointed). Symptoms can include an increased range of joint movement (joint hypermobility), stretchy skin, fragile skin that breaks or bruises easily. EDS can affect people in different ways. For some, the condition is relatively mild, while for others their symptoms can be disabling. The different types of EDS are caused by faults in certain genes that make connective tissue weaker. Depending on the type of EDS, the faulty gene may have been inherited from 1 parent or both parents. Sometimes the faulty gene is not inherited, but occurs in the person for the first time. Some of the rare, severe types can be life threatening.
Source: NHS