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Tenosynovitis involves inflammation of the protective sheaths surrounding some tendons (the rope or cord-like structures which connect muscles to the bones). It most commonly affects the tendons of the hand, wrist and arms, although it may occur at other tendon sites. When the gliding surfaces of the tendon and sheath become roughened and inflamed from overuse, Tenosynovitis will present as aching, tenderness and swelling of the affected area.

A form of Tenosynovitis involving the tendons of the deep muscles at the back of the forearm is known as Peritendinitis. De Quervain's or Stenosing Tenosynovitis results from inflammation or constriction of the tendons on the thumb side of the wrist.

Further information on this condition can be found in the printable document below.

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> Additional Information on Tenosynovitis