Hypermobility Syndrome: Symptoms & Signs

Medically Reviewed on 1/27/2021

Hypermobility syndrome is a condition characterized by movement of the joints beyond that normal expected range. It is estimated to occur in up to 10%-15% of children.

Signs and symptoms of joint hypermobility syndrome include

Because of the hypermobility, the joints are more prone to injury. Common signs of the syndrome include

  • the ability to place the palms of the hands on the floor with the knees fully extended,
  • hyperextension of the knee or elbow beyond 10 degrees, and
  • the ability to touch the thumb to the forearm.

Cause of hypermobility syndrome

While the exact cause is unknown, hypermobility syndrome is believed to be inherited and is also found in association with more serious medical conditions such as Marfan syndrome and Ehlers-Danlos syndrome.

Other hypermobility syndrome symptoms and signs

  • Back Pain
  • Being Able to Place the Palms of the Hands on the Floor with the Knees Fully Extended
  • Being Able to Touch the Thumb to the Forearm
  • Hyperextension of the Knee or Elbow Beyond 10 Degrees
  • Joint Dislocation and Sprains of Involved Joints
  • Pain in the Knees, Fingers, Hips, and Elbows
  • Scoliosis


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Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.