A trigger finger is a locking finger which gets stuck in certain degrees of flexion and either snaps back on its own or requires straightening by force. This occurs as a result of inflammation along the flexor tendon and the inflammation causes the tendon to become thickened. This thickened portion does not slide through the tendon sheath smoothly but rather gets stuck resulting in the trigger finger.
Treatment of trigger fingers usually requires surgical release. The incision is approximately one centimeter long and is placed along the distal crease of the palm. The area of impingement is incised and the thickened portion of the tendon trimmed. The procedure takes about thirty minutes and the recovery period is minimal.