<unk>  also known as double-jointedness, describes joints that stretch farther than normal. For example, some hypermobile people can bend their thumbs backwards to their wrists, bend their knee joints backwards, put their leg behind the head or perform other contortionist "tricks". It can affect one or more joints throughout the body. Hypermobile joints are common and occur in about 10 to 25% of the population, but in a minority of people, pain and other symptoms are present. This may be a sign of what is known as joint<unk> syndrome (JMS) or, more recently,<unk> spectrum disorder (HSD). Hypermobile joints are a feature of genetic connective tissue disorders such as<unk> spectrum disorder (HSD) or Ehlers–Danlos syndromes (EDS). Until new diagnostic criteria were introduced,<unk> syndrome was sometimes considered identical to Ehlers–Danlos syndrome hypermobile type/EDS Type 3. As no genetic test can distinguish the two conditions and because of the similarity of the diagnostic criteria and recommended treatments, many experts recommend they be recognized as the same condition until further research is undertaken. In 2016 the diagnostic criteria for EDS Type 3 were re-written to be more restrictive, with the intent of narrowing the pool of EDS Type 3 patients in the hope of making it easier to identify a common genetic mutation, EDS Type 3 being the only EDS variant without a diagnostic DNA test. At the same time<unk> spectrum disorder was redefined as a<unk> disorder that does not meet the diagnostic criteria for EDS Type 3 (or Marfan's, OI, or other collagen disorders) and renamed as<unk> spectrum disorder (HSD).
Hypermobility 
Ehlers–Danlos syndromes
Lattice degeneration
Joint locking 
Dispokinesis
Dystrophy
Ligamentous laxity
Zoobiquity