Trigger Finger

Trigger finger (stenosing tenosynovitis) occurs when inflammation narrows the tendon sheath surrounding the flexor tendon of a finger, causing the finger to catch, lock, or snap when bent. It is most common in the ring finger and thumb and is associated with repetitive gripping, diabetes, and rheumatoid arthritis. When caught early, trigger finger responds well to conservative treatment — including splinting to rest the inflamed tendon.

Common Causes of Trigger Finger

• Repetitive gripping, pinching, or grasping motions
• Diabetes mellitus (significantly increases risk)
• Rheumatoid arthritis and inflammatory joint disease
• Hypothyroidism
• Carpal tunnel syndrome (often co-occurs)
• Direct trauma to the palm at the base of the finger
• Women aged 40–60 are disproportionately affected

Common Symptoms:

• Finger stiffness and pain, especially in the morning
• A catching or locking sensation when bending the finger
• Audible or palpable click or snap with finger movement
• Inability to fully straighten the finger (in advanced stages)
• Tenderness and a nodule at the base of the finger (A1 pulley)
• Gradual worsening if left untreated — locking in a bent position

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How Is Trigger Finger Treated?

• Finger splinting to rest the tendon (primary conservative option)
• Corticosteroid injections into the tendon sheath
• NSAIDs and rest from aggravating activities
• Occupational therapy and tendon-gliding exercises
• Percutaneous needle release (minor in-office procedure)
• Surgical trigger finger release for recalcitrant cases
• Activity modification to avoid repetitive gripping

How a Trigger Finger Splint Helps:

Splinting the affected finger in extension (particularly overnight) allows the inflamed tendon and its sheath to rest, reducing swelling and preventing the catching that worsens the inflammatory cycle. Studies show that splinting resolves trigger finger in approximately 55–66% of patients without the need for injection or surgery — especially effective in early stages. RCAI offers trigger finger and digit splints in a range of sizes with cushioned inner liners and adjustable straps for all-day or nighttime use.

All products are available with a physician’s prescription. Contact your healthcare provider or orthotist to determine the right brace for your condition.