Finger Gets Stuck When Bending? Here's What It Means and What to Do
Updated July 20261 minute read
A finger that catches, locks, or snaps when you bend or straighten it is the classic sign of trigger finger — the flexor tendon catching on a tight pulley at the base of the finger. It's often worst in the morning and tied to a tender bump there. It's not dangerous, and many cases improve with a splint, activity changes, and tendon-gliding exercises. Persistent locking may need an injection.
What this usually means
Most likely causes. Trigger finger is the leading cause of a finger that catches or locks when bending. Less common causes. Finger joint arthritis or other tendon issues can cause stiffness, but the snapping/locking pattern is most typical of trigger finger.
What you can try at home
Reduce repetitive forceful gripping, and a splint that limits the catching (especially at night) often helps. Gentle tendon-gliding movements keep the finger moving. If the finger fully locks and won't release, get it assessed.
When to see a physical therapist
If a finger keeps catching or locking, a PT can fit a splint and guide tendon-gliding exercises.
Red flags — don't wait
Seek prompt care for a finger locked and unable to release, signs of infection (hot, red, swollen with fever), or a finger problem after a significant injury.
How a PT treats this
Treatment offloads the tendon with a splint, reduces aggravating gripping, and uses tendon-gliding exercises.
Frequently asked questions
Sources (3)
- AAOS OrthoInfo: Trigger Finger. — AAOS OrthoInfo
- Jeanmonod R, et al. Trigger Finger. In: StatPearls. NCBI Bookshelf. — NIH/NCBI Bookshelf
- MedlinePlus: Finger pain. — NIH/MedlinePlus
This article is for education only and isn't medical advice. Always talk to a licensed clinician about your specific situation.