Trigger Fingers


Trigger finger will cause a catching of the finger. The finger can get stuck in a bent or flexed position and can be quite painful to unlock. The ring finger is often involved.


Normal appearance of the flexor tendon and sheaths. There is no swelling. This allows the tendon to glide smoothly through these pulleys.


This shows the abnormal anatomy in a trgger finger. The tendon has a swelling in front of the first pulley. This causes the pulley to get inflammed and swollen as well. This, in turn, causes the tendon to get caught, and then suddenly "pops through" the pulley, causing the typical triggering that occurs in a trigger finger.

Raymond Severt 2013