Trigger finger is a condition where one of your fingers gets stuck in a bent position, then snaps straight like a trigger being pulled and released. The medical name is stenosing tenosynovitis, and it affects more than 3% of the general population. It most commonly strikes the ring finger or thumb, though any finger can be involved.
The core problem is mechanical: the tendons that bend your fingers normally glide smoothly through a series of tunnels (called pulleys) in your hand. When the first tunnel at the base of your finger becomes narrowed and inflamed, the tendon can no longer slide freely. Over time, small nodules form on the tendon itself, making the fit even tighter. The tendon gets caught going through, then pops through with a snap. That catching sensation is the hallmark of trigger finger.
What Causes It
Repetitive gripping, squeezing, or forceful use of the fingers creates microtrauma at the point where the tendon meets its tunnel. This is the spot that bears the most mechanical stress during everyday hand use. Over time, the repeated friction triggers inflammation, thickening of the tunnel walls, and changes in the tissue itself. The tunnel lining actually transforms into a tougher, cartilage-like tissue that doesn’t stretch the way healthy tissue does.
Certain conditions raise your risk significantly. People with diabetes develop trigger finger at rates between 5% and 20%, compared to around 3% in the general population. Rheumatoid arthritis, gout, thyroid disorders, and metabolic syndrome are also associated with higher rates. The condition is more common in women, typically appears between ages 40 and 60, and often affects the dominant hand.
What It Feels Like at Each Stage
Trigger finger doesn’t usually start with the dramatic snapping. Clinicians use a four-grade scale to describe its progression:
- Grade I (pretriggering): Pain and tenderness at the base of the finger, near the palm. You might feel catching but only intermittently. No visible locking yet.
- Grade II (active triggering): The finger catches noticeably when you bend it, but you can still straighten it on your own.
- Grade III (passive triggering): The finger locks in a bent position, and you need your other hand to push it straight. In more advanced cases, you may also lose the ability to fully bend the finger.
- Grade IV (contracture): The finger is stuck in a bent position and cannot be straightened, even with help. The middle joint of the finger develops a fixed deformity.
Most people notice it first thing in the morning or after gripping something tightly for a while. Stiffness and soreness at the base of the affected finger, right where the palm meets the finger, are the earliest signs. You may also feel a small bump or nodule in that area.
Nonsurgical Treatment Options
For mild to moderate trigger finger, several conservative approaches can resolve the problem without surgery.
Splinting
A small splint that holds the finger straight at the base or middle joint during sleep can reduce triggering. You only need to wear it at night for a trial period of about two months. Daytime splinting isn’t necessary. The goal is to rest the tendon and prevent it from getting caught in a bent position overnight, which is what causes that painful morning stiffness.
Steroid Injections
A corticosteroid injection into the tendon sheath is one of the most common first-line treatments. A single injection resolves symptoms in about 57% of patients. When a second injection is given to those who don’t fully respond, the combined cure rate climbs to 86%. Injections work best for people with milder, more recent symptoms. The relief can be long-lasting, though some people experience recurrence months or years later.
Exercises and Manual Therapy
Gentle tendon gliding exercises help keep the tendon moving freely within its sheath. One of the most useful is the hook fist: keeping your palm and knuckles straight, you curl just the tips and middle segments of your fingers down to form a hook shape, then extend fully. This creates a sliding motion between the two tendons in each finger (about 10 to 11 millimeters of movement) without overloading the inflamed tunnel. Full extension during the exercise is important to prevent the middle joint from tightening up.
Another technique is the “place-and-hold” exercise. You use your other hand to gently fold the affected finger into a full fist, hold for 5 to 10 seconds, then use the other hand again to open it. This promotes fluid circulation within the tendon sheath and helps remodel any scar tissue that has formed. Massage of the forearm muscles and the tendons in the palm can also reduce painful tightness.
When Surgery Is Needed
If splinting and injections don’t work, or if the finger has progressed to a locked position, surgery is the next step. The procedure is straightforward: the narrowed tunnel is cut open to give the tendon room to move freely again. There are two main approaches.
Open Release
The surgeon makes a small incision in the palm and directly cuts the tight portion of the tunnel under visual guidance. It’s done under local anesthesia, typically as a day procedure. Recovery takes longer than you might expect for such a small operation. You’ll need to avoid using the hand for one to two weeks, keeping lifting below 1 to 2 pounds. Stitches come out at one to two weeks, and full healing takes about six weeks. Complications are uncommon: infection occurs in about 1% of cases, nerve irritation in 0.3%, and a structural issue called bowstringing (where the tendon pulls away from the bone slightly) in 0.1%.
Percutaneous Release
In this approach, a needle is inserted through the skin to cut the tunnel without a traditional incision. The results are notably faster. Half of patients experienced pain relief within two days, compared to seven days with open surgery. The return-to-work difference was even more striking: a median of three days for the percutaneous group versus 15 days for open release. A study tracking outcomes over 42 months found a 97.6% success rate with no nerve injuries and no recurrences. About 2.4% of cases required conversion to open surgery when the percutaneous attempt didn’t fully release the tunnel.
Recovery After Surgery
Regardless of the surgical method, the first two weeks focus on wound healing and protecting the hand. Light use begins after stitches are removed. You’ll likely be encouraged to start gentle finger movements early to prevent stiffness, but heavy gripping and repetitive motions should wait.
Full recovery, including restored grip strength and range of motion, typically takes about six weeks. Some people need hand therapy during this period, especially if the finger was locked for a long time before surgery. The same tendon gliding and fist exercises used in conservative treatment play a role here too, helping the tendon move smoothly through the newly opened tunnel and preventing scar tissue from recreating the original problem.
Most people regain full function. The surgical success rate is high, and recurrence after a properly performed release is rare. The biggest factor in recovery speed tends to be how long the finger was stuck before treatment. A finger caught at Grade IV with a fixed contracture takes longer to rehabilitate than one treated at Grade II, even after the mechanical obstruction is resolved.