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Hypermobility describes and joints that stretch further 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. When present in the hands, it is colloquially referred to as "double-jointedness". == Signs and symptoms == People with hypermobility syndrome may develop other conditions caused by their unstable joints. These conditions include: * Joint instability causing frequent sprains, tendinitis, or bursitis when doing activities that would not affect others * Joint pain * Early-onset osteoarthritis (as early as during teen years) * Subluxations or dislocations, especially in the shoulder (Severe limits to ability to push, pull, grasp, finger, reach, etc., is considered a disability by the US Social Security Administration). * Knee pain * Back pain, prolapsed discs or spondylolisthesis * Joints that make clicking noises (also a symptom of osteoarthritis.) * Susceptibility to whiplash * Temporomandibular Joint Syndrome also known as TMJ * Increased nerve compression disorders (e.g. carpal tunnel syndrome) * The ability of finger locking * Poor response to anaesthetic or pain medication * "Growing pains" as described in children in late afternoon or night 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hypermobility (joints)」の詳細全文を読む スポンサード リンク
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