Why Your Finger Clicks or Locks, and the Window That Decides Your Treatment
Trigger finger is your flexor tendon in your finger “catching” (or triggering, or locking) on the first pulley at the base of your finger, the A1 pulley because the tendon or its lining has thickened.
That’s the click you feel, and later the lock.
If assessed, diagnosed and treated early, most trigger finger cases settle with a night splint and activity changes over about 6 weeks…but often life and responsibilities dont allow that, and many patients leave it be for an extended amount of time.
When it’s left to worsen and degrade over time, that can lead to the finger jamming and locking daily, and sooner or later you may need to escalate your treatments to a steroid injection.
If that doesn’t work or it worsens, locked fingers end up in surgery. The gap between those outcomes is mostly time, and this article is about not losing it.
What’s actually happening in there
So our fingers have no muscles of their own.
Every finger flexing/bending is a tendon being pulled from the forearm, running through a series of pulleys that hold it against the bone, like a cable through guides. The first pulley (A1 pulley in the finger), right at the base of the finger in your palm, takes the most friction.
Over time, force and enough repetition, gripping tools, phones, steering wheels, dumbbells, the tendon or its sheath thickens at that pulley.
Now a slightly-too-thick tendon is being dragged through a tunnel that no longer fits it. At first it catches and releases with a light “un-lockable” click.
But it may not stop there.
As the thickening grows into a small nodule, the nodule starts jamming on the pulley’s edge, and the finger locks bent. Forcing it straight with the other hand gives that painful snap, which is the nodule popping through…painfully.
One more thing patients are often surprised by: the tender spot is in the palm at the base of the finger, not at the joint that’s locking. The middle joint gets blamed because it’s the one that sticks.
The problem lives lower down.
How trigger finger typically progresses
Trigger finger has stages, and the stage decides the treatment, which is why waiting quietly degrades and limits your options.
It usually opens with morning stiffness and a click when you bend the finger, no real pain yet. Then the click becomes tender, and you start noticing it during the day, not just mornings. Then comes catching: the finger hesitates on the way to straight, and some mornings you wake with it curled or locked in flexion but still can unlock, with the help of the other hand. Finally, at the 4th worst stage, permanent locking: the finger stays bent until you pull it straight with much difficulty, and in the worst cases it can’t be pulled straight at all.
This degradation from click to lock can take weeks or months, and it isn’t guaranteed, some mild cases stay mild or settle on their own.
But here’s the honest version of the odds: a clicking finger in week 2-6 has splint-and-settle written on it. Compare that to a locking finger in month 4 rarely splints its way out, because by then the nodule is established and every day of locking adds a little more irritation and a little more thickening.
The condition feeds itself.
When it stops being minor
My rule for this one: a click that’s been around under 2 to 3 weeks, not locking, not waking you, is worth a fortnight of sensible self-management, cut the gripping load and frequency…be more careful and it may recover in time.
But! A finger that catches or locks, or a click that’s still there after 3 weeks of behaving yourself, gets assessed by a hand therapist or hand occupational therapist.
A finger locked bent that you cannot straighten even passively is a this-week immediate problem, because joints held bent start stiffening into that position, and then you’re rehabilitating two problems instead of one…and that’s a lot harder than early stage trigger finger.
People with diabetes, take this one more seriously: trigger finger is more common, more often affects several fingers, and responds less predictably to injections.
When in doubt, always always earlier assessment, not later.
What treatment actually looks like
Early stage: splinting and load management
A small splint holds the base knuckle still, usually worn at night, sometimes during heavy-use hours, for around 6 weeks.
The logic is simple: stop dragging the thickened tendon through the pulley hundreds if not thousands of times a day, and the irritation cycle gets a chance to wind down from the rest.
Alongside it, the load audit: what does this hand grip for hours, and what can change? The grip size, the tool, the phone habit, the training programme.
Splints work noticeably better when the thing that caused the thickening isn’t still causing it.
Established stage: injection
A corticosteroid injection into the tendon sheath settles the swelling rather than the habit, and it works well in the short term for relief: most fingers respond, though a share of them recur within a year or two, more often in diabetics.
It’s a genuinely good tool.
It’s also the tool people end up needing because the splint window was spent waiting.
Late stage: surgery
A short procedure releases the A1 pulley so the tendon runs free.
Reliable, quick, and recovery is usually measured in weeks. The hand still needs those weeks, though: scar care, gradual loading, and winning back any motion the finger lost while it was locked.
Surgery fixes the pulley. It doesn’t refund the joint or soft tissue stiffness your finger developed and paid for by waiting.
What recovery feels like, week by week
For the splint-and-settle route: weeks 1 to 2, the morning click softens but doesn’t vanish, and the main work is remembering the splint and catching the gripping habits.
Weeks 3 to 4, most people notice the finger moving cleaner, the tenderness in the palm shrinking.
Weeks 5 to 6, the click is occasional or gone.
If nothing has shifted by week 3 to 4 of honest splinting, that’s not a sign to splint harder, it’s a sign this one needs the next step.
The short version
A click is your cheapest warning (and it’s the one that most patients ignore cos its not a red loud blaring alarm).
A lock starts to get more expensive. If your finger is clicking and it’s new, change what the hand does and give it 2 to 3 weeks. If it’s catching, locking, or the click has outstayed 3 weeks, get it assessed, because every stage this condition advances closes a treatment door that was simpler than the next one.
Written by Nigel Chua, hand occupational therapist in practice since 2005. Tens of thousands of hands assessed and treated. My credentials are here. This article explains; it doesn’t examine. If your finger is locking, someone needs to look at it in person.
Leave a Reply