A finger that catches as it bends, then releases with a click — or one that locks bent in the morning and has to be straightened with the other hand. It is uncomfortable, alarming the first time, and mechanically quite simple.
It is also the condition on this site where we have least to offer, so this article is mostly about what does work.
What is happening
The mechanics are unusually easy to picture, and picturing them explains why the treatments that work, work.
The tendons that bend your fingers run from the forearm through a series of fibrous tunnels in the palm and finger, which hold them close to the bone.
If the first of those tunnels thickens, or the tendon passing through it swells, the two no longer glide smoothly past each other. The tendon has to force its way through, catches, and then pops free — which is the trigger.
You can usually feel a tender lump in the palm at the base of the affected finger. That is the point of catching, and it is a useful thing to be able to point at in an appointment.
Or is it something else?
| Trigger finger | Dupuytren’s | Arthritis | |
|---|---|---|---|
| Main symptom | Catching, clicking, locking | A finger that will not straighten | Ache and stiffness |
| What you feel | A tender nodule in the palm | A firm cord under the skin | Bony change at the joint |
| Clicking | Yes | No | Grinding, not clicking |
| Mornings | Locked, then releases | Unchanged | Stiff for under half an hour |
| Progression | Comes and goes, can worsen | Slow and steady | Slow |
| Read more | This page | See your doctor | Hand and thumb arthritis |
Who gets it
None of these are things you can undo, but two of them change what an assessing clinician will want to know.
It is commoner than people expect, and there are a few associations worth knowing.
- Repeated forceful gripping — tools, steering wheels, secateurs, gym work.
- Diabetes, where it is notably more common and somewhat harder to treat. Worth mentioning to whoever assesses it.
- Age and sex — most common between forty and sixty, and more common in women.
- Other hand conditions. It travels with carpal tunnel syndrome and de Quervain’s tenosynovitis more often than chance would suggest.
What the evidence supports
Set out plainly, including the row that is unflattering to us.
| Treatment | How well it works | Notes |
|---|---|---|
| Reducing forceful gripping | Helps, slowly | Padded handles, lighter tools |
| Overnight splint | Reasonable support | Weeks rather than days; needs sticking to |
| Corticosteroid injection | Resolves the large majority | Less effective with diabetes |
| A second injection | Often effective | If the first helped but did not last |
| Surgical release | Highly effective | For cases that injections do not settle |
| Acupuncture | No meaningful evidence | Which is why this table exists |
What to expect from an injection
Since it is the answer for most people, it is worth knowing what it involves rather than arriving cold.
The injection goes into the tendon sheath at the base of the finger, takes moments, and is uncomfortable rather than dreadful. The catching typically settles over the following days to weeks rather than immediately. A meaningful proportion of people need a second one, which is normal rather than a sign of failure.
NYU Langone Health publishes patient information on hand tendon conditions if you want to read further before that appointment.
The splint, if you want to try first
Some people would rather try something conservative before an injection, which is entirely reasonable.
The splint holds the knuckle joint straight, usually overnight, so the tendon spends the night not catching. It leaves the fingertip free enough to be tolerable. Expect to give it six to ten weeks, and combine it with genuinely reducing the gripping that provokes it.
The same principle as the splinting discussed in de Quervain’s tenosynovitis: unload the structure at the moments that irritate it.
Where we fit, which is not really here
Every practice has conditions it can help with and conditions it cannot, and being able to say which is which is most of what makes the rest of this site worth reading.
We are not going to claim a role. There is no meaningful trial evidence for acupuncture in trigger finger, and the mechanism — a tendon physically catching in a thickened tunnel — is not one needling plausibly addresses.
If you have trigger finger, see a doctor or a hand specialist. If you also have general hand and forearm tightness from the work that caused it, that is a different conversation and one we can have honestly.
When to see a doctor
See a doctor if the finger locks and will not release, if it is hot, red or swollen, if it developed after an injury, if you have diabetes and a new hand problem, or if a finger is gradually losing the ability to straighten without any clicking.
Booking a session in Beverly
If what you want is help with the hand and forearm tension that came with the work, acupuncture is $75 and massage is $45 for 30 minutes — all on our rates page.
See also hand and thumb arthritis, carpal tunnel syndrome and de Quervain’s. Browse all our articles or get in touch.
Frequently asked questions
What causes trigger finger?
The tendon that bends the finger runs through a series of tunnels in the palm. The first of those thickens or the tendon swells, so it no longer glides smoothly. It catches on the way through, then releases with a snap.
Why is it worse in the morning?
Because the finger has been still and slightly bent for hours, and swelling has had time to accumulate. Many people wake with the finger locked and have to straighten it with the other hand.
Does a splint work?
It has reasonable support, particularly worn overnight, holding the knuckle straight so the tendon is not repeatedly catching. It takes weeks rather than days and works best combined with reducing forceful gripping.
Is an injection the usual answer?
Often, yes. A corticosteroid injection into the tendon sheath resolves a large majority of cases, frequently with one or two treatments. It is less effective in people with diabetes, and that is worth knowing in advance.
Does acupuncture help trigger finger?
There is no meaningful evidence that it does. This is a mechanical catching problem in a tendon sheath, and we would rather point you at what works than take a booking for it.
This article is general information, not medical advice. Acupuncture is intended to work alongside the care of your doctor, not to replace it. Please speak to a clinician about any new, severe or changing symptom.