Your Finger Keeps Locking or Catching — Is It Trigger Finger? — Form & Function with Dr. Ben
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No Big Deal / Red Flag

Your Finger Keeps Locking or Catching:
Is It Trigger Finger?

A finger that clicks, catches, or locks into a bent position is not something to normalize. It is a specific mechanical problem with a specific solution — and the sooner it is addressed, the simpler that solution tends to be.
Dr. Ben Levine, MD
April 21, 2026
5 min read
From Issue 5 · The Form & Function Brief
Hand & Wrist No Big Deal / Red Flag Tendon

Trigger finger — stenosing tenosynovitis of the flexor tendon — is exactly what it sounds like: a finger that catches or locks as you bend or straighten it, sometimes releasing with a painful snap, sometimes requiring you to manually straighten it with the other hand. It happens when a nodule forms on the flexor tendon and cannot pass smoothly through the fibrous pulley at the base of the finger. Most people spend weeks or months writing it off as a minor nuisance before they come in. By the time they do, the locking is more frequent, the snap is more painful, and the finger is beginning to stay locked for longer stretches.

The thumb is the most commonly affected digit, followed by the ring and middle fingers. It is significantly more common in people with diabetes, rheumatoid arthritis, and in women in the sixth decade of life — but it appears without any of those predisposing factors in people who perform repetitive gripping, including gardeners, construction workers, and fishermen who spend hours working rod handles and lures. Morning is typically the worst time, as the tendon tightens overnight and the first flex of the day meets the most resistance.

No Big Deal — Mild and Early
  • Occasional catching or clicking that resolves on its own without forcing
  • Morning stiffness that loosens up within the first hour of activity
  • Mild tenderness at the base of the affected finger on the palm side
  • No true locking — the finger moves through its full range with some discomfort
Red Flag — Time to Get Evaluated
  • Finger locks in a bent position and requires force or the other hand to straighten it
  • Locking episodes are increasing in frequency or duration over weeks
  • Significant pain with every attempt to flex or extend the finger
  • The finger is beginning to rest in a bent position even without active use
  • Symptoms developing in multiple fingers simultaneously

Trigger finger is very treatable at every stage, but early treatment is simpler. A corticosteroid injection into the tendon sheath at the A1 pulley resolves the condition completely in a large majority of cases when caught early — among my most reliably effective office procedures. For cases that don't respond, a minor outpatient release of the pulley is curative with an extremely high success rate and a short recovery. The message: do not normalize a finger that catches. It will not resolve on its own.

"Do not normalize a finger that catches. Early treatment is simpler — a corticosteroid injection resolves the majority of cases completely. It will not resolve on its own."

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References
  1. Makkouk AH, Oetgen ME, Swigart CR, Dodds SD. Trigger finger: etiology, evaluation, and treatment. Current Reviews in Musculoskeletal Medicine. 2008;1(2):92–96. doi:10.1007/s12178-007-9012-1
  2. Ryzewicz M, Wolf JM. Trigger digits: principles, management, and complications. Journal of Hand Surgery. 2006;31(1):135–146. doi:10.1016/j.jhsa.2005.10.013
  3. Fleisch SB, Spindler KP, Lee DH. Corticosteroid injections in the treatment of trigger finger: a level I and II systematic review. Journal of the American Academy of Orthopaedic Surgeons. 2007;15(3):166–171. doi:10.5435/00124635-200703000-00005
Originally published in Volume 1, Issue 5 · April 21, 2026 ← Back to Archive