Mac Moore M.D. | Orthopedic Surgeon in Oklahoma City

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Trigger Finger

Trigger finger, trigger thumb, or trigger digit, is a common disorder characterized by catching, snapping or locking of the involved finger flexor tendon, associated with dysfunction and pain.

A disparity in size between the flexor tendon and the surrounding retinacular pulley system, most commonly at the level of the first annular (A1) pulley, results in difficulty flexing or extending the finger and the “triggering” phenomenon. The label of trigger finger is used because when the finger unlocks, it pops back suddenly, as if releasing a trigger on a gun.

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