Does your finger click, lock, or get stuck when you try to straighten it?
Trigger Finger — the tendon is catching inside a narrowed tendon sheath.
Is your finger stiff in the morning or do you feel a hard nodule in your palm? In severe cases the finger can lock in a bent position and refuse to straighten.
Quick Answer: Trigger finger (stenosing tenosynovitis) occurs when the flexor tendon catches or struggles to pass through the finger’s pulley (annular ligament). The tendon thickens or the pulley narrows, preventing smooth movement. The key is to calm sheath inflammation (Calm Down), restore finger flexor and hand-forearm muscle balance (Wake Up), and improve hand use patterns (Connect).
Seek medical attention quickly if:
- Finger is completely locked and cannot be straightened even with force → seek immediate care
- Significant fever or redness alongside symptoms → rule out infectious tenosynovitis
- Sudden locking after trauma → rule out tendon injury
3 Key Points on This Page
- Typical symptoms of trigger finger and how it progresses
- Why it develops — tendon overload and associated conditions
- How the 3-stage Circulation Therapy restores recovery
These symptoms suggest trigger finger
- Catching or clicking sensation when bending the finger — A distinct “snap” or catch, like pulling a trigger.
- Worse in the morning — Finger feels stiff on waking but loosens up with movement.
- Hard nodule and tenderness at the base of the finger in the palm — A firm, tender bump can be felt in the lower palm.
- Locking in severe cases — The finger stays bent and must be manually straightened with the other hand.
- Most commonly affects the thumb, middle, and ring fingers — One or multiple fingers may be involved at the same time.
Why does trigger finger develop?
The flexor tendons in the fingers pass through ring-like pulleys (annular ligaments) in the palm. These pulleys keep the tendons close to the bone so they can transmit force efficiently to the fingertips.
Key causes include:
- Repetitive gripping motions — Accumulated friction and load (Load) on the tendon lead to thickening.
- Tendon thickening — The tendon enlarges and can no longer glide smoothly through the pulley.
- Diabetes — Affects tissue metabolism and promotes changes in tendons and pulleys.
- Hypothyroidism — Can contribute to swelling of tissues around the tendon sheath.
- Elevated nervous system sensitivity (Alarm) — Increased pain sensitivity makes even minor catching feel much more intense.
Stages of Trigger Finger
- Stage 1: Pain and tenderness at the finger base; no catching yet
- Stage 2: Catching with active triggering (finger can spring back on its own)
- Stage 3: Locking — must use the other hand to passively straighten the finger
- Stage 4: Complete lock — cannot be straightened even with force
※ Early treatment before Stage 3–4 is strongly advised.
Our Approach at Yonsei SM Pain Clinic
Trigger finger requires calming tendon sheath inflammation and restoring hand and forearm muscle balance.
- Phase 1: Calm Down (Circulation HD)
Ultrasound-guided hydrodissection targets inflammation and adhesions around the A1 pulley. Creating space allows the tendon to glide more freely and reduces pain. - Phase 2: Wake Up (Circulation PT)
We normalize finger flexor function and restore balance between hand and forearm muscles. Tendon gliding exercises train the tendon to pass smoothly through the pulley. - Phase 3: Connect
We help you modify how you use your hand — adjusting tool grip size, reducing repetitive gripping frequency, and building daily habits that prevent recurrence.
Trigger Finger Self-Care
What You Can Do Now
- Reduce the frequency and force of gripping activities
- Use a finger splint or taping for support
- Switch to tools with thicker, padded handles
- Warm compress (2–3 times daily, 15–20 min) to improve circulation
- Tendon gliding exercise — slowly open and close the finger fully
What to Avoid
- Forcing a locked finger straight (risk of tendon injury)
- Continuing repetitive gripping through pain
- Using thin-handled tools for extended periods
- Letting symptoms progress to Stage 3–4 without treatment
If the finger locks completely or fever and redness develop, seek medical care promptly. The longer trigger finger progresses, the more difficult treatment becomes.
Frequently Asked Questions
How is trigger finger different from De Quervain’s tenosynovitis?
Trigger finger involves the tendon catching at the pulley on the palm side of the fingers. De Quervain’s is inflammation of the tendon sheath on the thumb side of the wrist. Both are tendon sheath problems but at different locations with different symptoms. De Quervain’s Tenosynovitis →
I have diabetes and my trigger finger keeps coming back. Why?
Diabetes accelerates changes in tendons and surrounding tissue, increasing the risk of trigger finger developing and recurring. Alongside blood sugar management, reducing tendon overload through lifestyle changes is essential. Recurrence Q&A →
Can trigger finger affect multiple fingers at the same time?
Yes, trigger finger can involve one finger or multiple fingers simultaneously. When systemic conditions such as diabetes or rheumatoid arthritis are present, multiple fingers are more commonly affected at once. Movement Assessment →
Can trigger finger resolve on its own without treatment?
In very early cases, rest and activity modification alone may bring improvement. However, once catching and snapping begin, structural changes have already occurred in the tendon sheath. At this point, active treatment is beneficial and waiting tends to allow progression. Circulation Therapy →
My wrist hurts too — is it related?
Wrist pain can co-exist with trigger finger. Hand and forearm muscle imbalance, or concurrent De Quervain’s tenosynovitis, may contribute. A combined assessment helps clarify the picture. Carpal Tunnel Syndrome →
References
- Makkouk AH et al. Trigger finger: etiology, evaluation, and treatment. Curr Rev Musculoskelet Med. 2008;1(2):92–96. PMC2684207
- Peters-Veluthamaningal C et al. Corticosteroid injection for trigger finger in adults. Cochrane Database Syst Rev. 2009;(1):CD005617.
- Wojahn RD et al. Long-term outcomes following a single corticosteroid injection for trigger finger. J Bone Joint Surg Am. 2014;96(22):1849–1854.
- Wang J et al. Percutaneous release, open surgery, or corticosteroid injection, which is the best treatment method for trigger digits? Clin Orthop Relat Res. 2013;471(6):1879–1886.
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