06/16/2026
Trigger finger isn’t a problem with the tendon itself.
The tendon glides through a series of pulleys (ligaments) that keep it close to the bone. When the pulley becomes thickened or inflamed, the tendon can no longer glide smoothly, causing the painful catching, clicking, or locking sensation many patients experience.
In this ultrasound exam, you can see the tendon moving dynamically beneath the pulley and the exact point where motion becomes restricted.
One of the advantages of musculoskeletal ultrasound is the ability to identify the problem in real time while the finger is moving.