Trigger Finger (Stenosing Tenosynovitis)

Common Symptoms

• A finger or thumb that catches, locks, or snaps when bending or straightening
• A tender, sometimes palpable nodule at the base of the affected finger, in the palm
• Stiffness that's often worse in the morning
• In more advanced cases, a finger that locks in a bent position and needs to be manually straightened

Why It Happens

The flexor tendon that bends the finger passes through a series of pulleys that keep it close to the bone. When the tendon or the pulley (most often the first, or A1, pulley) becomes thickened or irritated, the tendon can't glide smoothly through it, causing catching and, eventually, a palpable nodule as the tendon itself thickens in response.

Why It Can Become Persistent

Once the tendon-pulley mismatch develops, ordinary use of the hand — which is difficult to avoid — keeps reproducing the catching and irritation, and the nodule that forms as a response to that irritation can itself perpetuate the problem.

Who Commonly Gets It

Trigger finger is more common in people with diabetes, in those who perform repetitive gripping activities, and generally in adults over 40, more often women.

How It Is Usually Diagnosed

Diagnosis is clinical — a history of catching or locking, plus exam findings of a tender nodule and reproducible triggering with finger movement. Imaging is not usually necessary.

Traditional Treatment Options

• Splinting: A splint that keeps the affected joint from fully bending can help milder cases.
• Activity modification: Reducing repetitive gripping activity that aggravates symptoms.
• Corticosteroid injection: A well-established, often effective first-line treatment for trigger finger.
• Surgical release (A1 pulley release): A minor procedure to release the tight pulley, generally reserved for cases that don't respond to conservative treatment.

Why Someone Might Start Looking for Another Option

Some people would rather avoid a corticosteroid injection, or want a non-invasive option before considering surgical release, which is where shockwave therapy comes into the conversation.

Where Shockwave Therapy May Fit

This is one of the better-evidenced hand conditions on this site. A randomized controlled trial directly compared shockwave therapy with corticosteroid injection and found no significant difference in cure rate, pain, or function between the two at 6 months — suggesting shockwave therapy may be a genuine non-invasive alternative for people who'd prefer to avoid injection. A separate systematic review and meta-analysis of 12 randomized trials found shockwave therapy produced significantly better pain relief and clinical outcomes than various comparison treatments, while noting the overall quality of the underlying trial evidence is still limited.

How Shockwave Treatment Works for This Area

Acoustic pressure waves are applied over the affected pulley and tendon at the base of the finger. Your provider will discuss how this compares with corticosteroid injection for your specific situation.

What the Treatment Feels Like

Most patients describe a firm tapping or pressure sensation directly over the tender nodule in the palm; your provider will discuss what to expect.

What Happens During Your First Visit

Your visit begins with a provider evaluation focused on your history and a physical exam relevant to your complaint. If shockwave therapy is determined to be clinically appropriate, your first treatment can typically be provided the same visit. See our What to Expect page for the full walkthrough.

Who May Not Be Appropriate

• Anyone who has not yet had a medical evaluation to confirm the diagnosis
• A finger that is persistently locked and cannot be straightened, which may need more urgent hand specialist evaluation
• Active infection, open wounds, or certain bone conditions at the treatment site
• Certain circulatory, neurological, or bleeding-related conditions, per your provider's screening

This list is not exhaustive. Your provider will screen for contraindications during your evaluation.