Trigger finger
A common condition where a finger catches or locks as it bends because a tendon is not gliding smoothly; it usually responds well to treatment
Trigger finger is a common condition in which a finger or thumb catches, clicks or locks as it bends or straightens. It happens when a tendon in the finger cannot glide smoothly through its sheath, often because the sheath has become narrowed or the tendon thickened. It can affect any finger and usually responds well to treatment.
Written for patients and reviewed by Dr Liubov Borukhson, Consultant Rheumatologist (GMC 7021928). Last clinically reviewed: June 2026.
Common symptoms
Trigger finger has a recognisable pattern. Features may include:
- Catching, clicking or locking of a finger or thumb as it moves
- A finger that becomes stuck in a bent position and then snaps straight
- Stiffness, particularly in the morning
- Tenderness or a small lump at the base of the affected finger
How it is diagnosed
Trigger finger can usually be recognised from the history and a simple examination of the hand. Confirming the diagnosis helps guide the right treatment.
Ultrasound can show the tendon and its sheath and confirm the problem, as well as allowing any injection to be placed accurately. Dr Borukhson uses point-of-care ultrasound during the consultation, so the hand can often be assessed in the same visit. You can read more on the ultrasound clinic page.
How it is treated
Milder cases may settle with rest, activity modification and sometimes a splint. Where symptoms persist, an ultrasound-guided injection into the tendon sheath is frequently very effective, and ultrasound guidance allows it to be placed precisely. More persistent cases may need referral for consideration of a minor procedure. The plan is agreed with you.
Why assessment helps
Trigger finger usually responds well to treatment, particularly when addressed early. If you have a finger that catches, clicks or locks, a specialist review, with ultrasound where helpful, can confirm the cause and offer effective treatment.
A finger that catches or locks?
A specialist assessment, with ultrasound where helpful, can confirm trigger finger and offer treatment including a guided injection where appropriate
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