Trigger Finger: Why Your Finger Clicks, Catches And Locks Shut
Written by Nigel Chua, Hand Therapist (Occupational Therapist) and Principal Hand Therapist at Phoenix Rehab Physio & Hand, Singapore.
Most people do not come to see me when their finger clicks.
They come when it stops moving.
That gap, between the first click and the day the finger will not straighten without help from the other hand, is usually months long. Sometimes a year. And almost every single one of them says the same sentence when they sit down.
“I thought it would go away.”
Here is what I want you to understand before you read anything else. Trigger finger is not a pain problem. It is a mechanical problem. And mechanical problems do not resolve by waiting, because nothing about resting a finger changes the size of the tunnel the tendon has to slide through.
Let me show you what is actually happening inside your hand.
What Trigger Finger Actually Is
Run your thumb across the base of your palm, right where the finger meets the hand. Press gently. If you feel a small tender lump there, and if that is the same finger that clicks, you have just found the problem.
Your finger does not have muscles in it. It is pulled by cords called tendons that run from muscles in your forearm, down through your palm, into the finger. Those tendons slide through a tunnel. Along that tunnel are a series of rings that hold the tendon close to the bone, the way the small metal loops on a fishing rod hold the line in place.
The first of those rings sits at the base of your finger. In trigger finger, two things happen at once. The tendon swells and forms a small nodule. The ring thickens and narrows.
So now you have a bigger rope trying to pass through a smaller hole.
When you bend the finger, the nodule squeezes through. When you try to straighten it, the nodule catches on the edge of the ring. That is the click. That is the catch. And when the nodule can no longer force its way back through, that is the lock.
The medical name is stenosing tenosynovitis. Stenosing means narrowing. That word tells you everything about why this does not fix itself.
Why It Is Called Trigger Finger
Nothing to do with anger or stress.
The name comes from soldiers. Men who spent long stretches with a finger curled around a rifle trigger started turning up with fingers that snapped and locked in that same bent position. Doctors named the condition after what caused it, and the name stuck for over a century.
The cause today is not rifles. It is anything that loads the base of your finger repeatedly. Gripping tools. Steering. Scissors. Carrying grocery bags by the handles. Racquet sports. Gym work with heavy bars and dumbbells. Long hours on a mouse with a curled hand.
The Signs, In The Order They Usually Arrive
This condition progresses in a predictable sequence. Find yourself on this list, because where you sit determines how easily it can be treated.
Stage one. Soreness and a lump. Tenderness at the base of the finger in the palm. A small firm bump you can feel. No clicking yet, or only occasionally. Most people ignore this stage completely.
Stage two. Clicking and catching. The finger snaps as you straighten it. It works, but it announces itself. Worse in the morning, better once the hand warms up through the day. This is the moment people start googling at 11pm.
Stage three. Locking that you can release yourself. The finger sticks bent. You have to use your other hand to pull it straight, and it releases with a painful pop. Many people learn to hide this. They stop shaking hands. They open jars differently.
Stage four. It will not straighten at all. The finger stays bent. Even the other hand cannot pull it flat.
That last stage is the one I want to talk to you about honestly, because it carries a consequence most people never get told.
The Part About Locking Trigger Finger Nobody Warns You About
When a finger stays bent for long enough, the middle joint of that finger begins to stiffen in the bent position. The soft tissue around the joint shortens. It settles into that shape.
Now here is the hard bit.
If it gets that far, releasing the tunnel does not automatically give you a straight finger back. You can have the surgery, the tendon can glide perfectly afterward, and the finger can still refuse to straighten. Because the problem is no longer the tunnel. The problem is now the joint itself, and that is a separate battle that takes a great deal more hand therapy to win. Sometimes it does not fully come back.
That is the real cost of waiting. Not more pain. A finger that has quietly changed shape while you were hoping it would sort itself out.
I have seen it enough times to be blunt with you about it. The people who do best are not the ones with the mildest cases. They are the ones who came in early.
Who Gets This
It is not random, and knowing whether you are in a higher risk group changes how urgently you should act.
Adults between 40 and 60. Most common window.
Women more than men. Consistently across the research.
People with diabetes. This is the group I watch most closely. Trigger finger is far more common in people with diabetes, often affects more than one finger, tends to respond less well to steroid injection, and comes back more often. If you have diabetes and a finger that clicks, do not adopt a wait and see approach. Get it assessed.
Thyroid conditions, rheumatoid arthritis, gout and kidney disease. All associated.
People who already have carpal tunnel syndrome or Dupuytren’s. These conditions travel together more often than chance would explain.
Anyone doing heavy repetitive gripping. Trade work, gym training, racquet sports, gardening, long hours holding tools.
The thumb. Trigger thumb is extremely common and often more disabling than people expect, because you cannot pinch anything without it.
What Makes It Worse (And Most Of These Are Things People Do On Purpose)
This is the section that matters most, because a lot of the damage I see is self inflicted with good intentions.
Squeezing a stress ball. The single most common mistake. The logic feels right. Strengthen the hand, fix the hand. But trigger finger is not a weakness problem. You are forcing a swollen tendon through a narrowed tunnel over and over, and every repetition adds friction and swelling. You are tightening the very thing that needs to loosen.
Grip trainers and hand strengtheners. Same problem. Worse, because the resistance is higher.
Forcing the locked finger straight. Every time you yank it open, you drag the nodule violently through the ring. That is trauma, not treatment.
Working through the click. The click is not a nuisance to be tolerated. It is the sound of a tendon catching.
Generic hand exercise videos. They are written for stiff hands and weak hands. Your hand is neither. It is obstructed.
Cortisone, then straight back to the same activity. The injection can settle the swelling beautifully. If nothing about the load changes, the swelling returns, and second injections into the same finger work less well than the first.
What Actually Works For Trigger Finger or Locked Finger Recovery
Here is the honest picture, in the order we usually work through it.
Splinting the knuckle joint. Not a full finger splint. A small orthosis that stops the big knuckle at the base of the finger from bending, while leaving the rest of the finger free to move. This changes how the tendon travels through the tunnel and takes the drag off the nodule. Worn mostly at night and during aggravating tasks. It is not a quick fix. A proper splinting programme runs six to ten weeks, and the published results in early stage cases are genuinely good, with a substantial proportion of fingers settling without injection or surgery. The catch is that it works far better in the early stages than the late ones, which is the same theme running through this entire article.
Tendon gliding done correctly. There is a specific sequence of finger positions that moves the tendon through its full range with the least drag. Done properly, it maintains movement without grinding the nodule through the ring. Done as a general “exercise the hand” approach, it makes things worse. This is why I am careful about what I put on the internet. The movement matters less than the dosage and the position, and that part needs eyes on your hand.
Changing the load. We work out exactly which tasks in your day are feeding this. Usually it is two or three specific things, and usually they are not the ones you expect. Adjusting them buys the tissue the quiet it needs to settle.
Corticosteroid injection. Done by a doctor, not by us. It settles the inflammation inside the sheath and works well for a lot of people, particularly in earlier stages. Success rates drop and recurrence rates rise in people with diabetes, and in fingers that have been locking for a long time. An injection combined with splinting and load change holds far better than an injection alone.
Surgical release. A small procedure that opens the tight ring so the tendon can glide freely again. For a stubborn, long standing, properly locked finger, this is often the right answer, and I will say so plainly rather than string you along with therapy that cannot solve a mechanical blockage. It is a reliable operation.
What it does not do by itself is give you back a joint that has already stiffened. That part is hand therapy work after the surgery, and it is the part patients are least prepared for.
After Trigger Finger Surgery
The tunnel is open. The tendon glides. People assume that is the finish line.
The first weeks after release are about three things. Getting the finger moving early so scar tissue does not form around the tendon and tether it. Managing the swelling. And working on the scar itself in the palm, which sits right where you grip and can stay tender and sensitive for longer than most people are told.
If the finger had been locked for months before surgery, there is a fourth job. Regaining the straightening of the middle joint. That takes structured, patient work.
Most people move well again quickly. The ones who struggle are almost always the ones who waited longest before the operation.
When To Stop Waiting…
Get your hand looked at properly if any of these are true.
- The finger locks and you need the other hand to release it
- It has been clicking for more than four to six weeks and is not settling
- You have diabetes and any finger that clicks or catches
- More than one finger is doing it
- The finger no longer straightens fully, even passively
- You have tried squeezing a ball or a grip trainer and it got worse
- You have had an injection and it has come back
A single assessment gives you the one thing you cannot get from the internet: what stage you are actually at, and therefore which of the paths above is genuinely still open to you.
Getting Your Locked or Clicking Finger Looked At
Hand therapy is a narrow field in Singapore. There are a great many physiotherapy clinics. There are very few therapists who work on hands all day, every day, and who see this condition weekly across every stage from a first click to a finger that has been locked for a year.
That matters here, because the entire treatment decision comes down to correctly reading how far along you are.
WhatsApp us at 83366009 and tell us which finger and how long it has been doing it. We will tell you honestly whether this is something we can settle without surgery, or whether you need a surgical opinion first. If it is the second one, we will say that too.
Phoenix Rehab Physio & Hand sees patients one to one, at Orchard, Tampines, Serangoon and Tanjong Pagar.
Your hands do the work of your whole life. Every jar, every steering wheel, every handshake, every time you hold onto someone. A finger that locks does not just hurt. It quietly starts deciding what you stop doing.
Get it assessed while all the options are still on the table.
Frequently Asked Questions About Triggering or Catching Fingers
Can trigger finger go away on its own? Very early cases sometimes settle if the aggravating activity stops completely. Once there is consistent clicking or locking, spontaneous recovery is uncommon, because the narrowing of the tunnel does not reverse simply through rest.
Is trigger finger the same as arthritis? No. Arthritis is a joint surface problem. Trigger finger is a tendon and tunnel problem. They can feel similar in the morning, which is why people self diagnose incorrectly, and they can also exist together in the same hand.
Will squeezing a stress ball help my trigger finger? No, and it commonly makes it worse. Gripping compresses an already inflamed tendon through an already narrowed tunnel. Trigger finger is not caused by weakness, so strengthening does not address it.
How long does trigger finger take to heal? With splinting and load management in early stages, expect a programme of roughly six to ten weeks. After surgical release, most people are using the hand normally within a few weeks, though scar sensitivity and full joint straightening can take longer.
Does trigger finger always need surgery? No. Many early and moderate cases settle with splinting, activity change and sometimes a steroid injection. Surgery becomes the sensible choice for fingers that have been locking for a long time, that have failed injection, or that will not straighten.
Why is my trigger finger worse in the morning? Fluid gathers in the tendon sheath overnight while the hand is still, so the nodule is at its largest first thing. As you move through the morning, the swelling disperses and the finger loosens.
I have diabetes. Is my trigger finger different? It tends to be. Trigger finger is more common in people with diabetes, more often affects several fingers, responds less reliably to steroid injection, and recurs more frequently. Earlier assessment is worth more in this group.
Can trigger finger cause permanent damage? It can. A finger left locked in a bent position for long enough can develop stiffness at the middle joint that persists even after the tunnel is released. That is the outcome we are trying to get ahead of.
Is there a specific splint for trigger finger? Yes. A small orthosis that blocks the knuckle joint at the base of the finger while leaving the other joints free. Off the shelf finger splints that immobilise the whole finger are a different device for a different problem and are not the same thing.
Which finger is most commonly affected? The ring finger and the thumb most often, though any finger can be involved, and more than one at the same time is common.
