Trigger finger — or stenosing tenosynovitis — causes a finger or thumb to catch, click, or get stuck in a bent position. Here's what causes it and how it is treated.
If your finger catches or clicks when you bend and straighten it — or if it locks in a bent position and requires force to release — you may have trigger finger. While the name sounds unusual, the condition is quite common and has well-established treatment options that provide most patients with lasting relief.
What Is Trigger Finger?
Trigger finger, known medically as stenosing tenosynovitis, is a condition affecting the flexor tendons of the fingers or thumb. These tendons run along the palm side of the hand through a series of tight tunnels called tendon sheaths. When the tendon or its surrounding sheath becomes inflamed or thickened, the tendon can no longer glide smoothly through the sheath — which can cause the characteristic catching, clicking, or locking sensation.
The condition gets its name from the way the finger can snap into a straight position after being stuck in a bent ("triggered") posture — like releasing the trigger of a gun.
Common Symptoms
Trigger finger most commonly affects the ring finger and thumb, but any finger can be involved. Symptoms typically develop gradually and may include:
- A clicking or popping sensation when bending or straightening the finger
- Tenderness at the base of the affected finger on the palm side
- Stiffness, especially in the morning
- A finger that catches or locks in a bent position
- The need to use the other hand to straighten the affected finger
- In severe cases, the finger may become fixed in a bent position and unable to straighten
Who Gets Trigger Finger?
Trigger finger is more common in women and in individuals over age 40. It occurs more frequently in people with diabetes, hypothyroidism, and inflammatory arthritis — particularly rheumatoid arthritis. It can also occur after sustained gripping activities or periods of repetitive hand use.
In some cases, multiple fingers are affected at the same time, or the condition recurs after treatment in individuals with certain systemic conditions.
How Is It Diagnosed?
Trigger finger is typically diagnosed by clinical examination. Andrew Yang, MD will palpate the palm side of the affected finger, feel for a nodule at the base of the tendon sheath, and assess how the finger moves through its range of motion. Imaging is rarely needed for a straightforward diagnosis.
Treatment Options
Splinting and Activity Modification
For mild cases, resting the affected finger with a splint — particularly at night — and reducing repetitive gripping activities may reduce inflammation and allow symptoms to improve. This is appropriate for early-stage or mild trigger finger.
Corticosteroid Injection
A corticosteroid injection into the tendon sheath is an effective and commonly used treatment. It reduces inflammation, allowing the tendon to glide more freely. Many patients experience significant improvement after one injection, though some require a second injection or additional treatment. Injection is generally well-tolerated and can be performed in the office.
Surgical Release
When injections do not provide adequate or lasting relief, surgical release of the tendon sheath (A1 pulley release) is a commonly performed procedure. It is performed as an outpatient procedure through a small incision in the palm. Recovery is generally straightforward, with most patients resuming normal hand use within a few weeks.
When to See a Specialist
If your finger is catching, clicking, or locking — especially if it is progressively worsening — it is worth seeking evaluation. Left untreated, trigger finger can worsen over time, and a finger that remains fixed in a locked position for an extended period may develop stiffness that complicates recovery.
Orthopedic hand specialists in Fort Lee, NJ and Bayside, NY (Queens) provide evaluation and treatment for trigger finger and related hand conditions. See our contact page to schedule an appointment.
Frequently Asked Questions
Does trigger finger go away without treatment?
Mild cases occasionally improve with rest and activity modification alone, but trigger finger does not reliably resolve without some form of treatment. Most patients benefit from a corticosteroid injection, which provides significant improvement in the majority of cases.
How many injections are needed for trigger finger?
Many patients improve significantly after one injection. A second injection may be offered if the first provided partial but incomplete relief. Surgical release is generally recommended for patients who do not achieve lasting improvement after injections.
Can trigger finger affect the thumb?
Yes. The thumb is one of the most commonly affected digits. When the thumb is involved, the condition is sometimes called "trigger thumb." The same treatment options — splinting, injection, and surgical release — apply to trigger thumb as to trigger finger.
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Note: This article is intended for general patient education only and does not constitute medical advice. Individual conditions vary. Please consult Andrew Yang, MD for diagnosis and treatment recommendations specific to your situation.