Trigger finger is a condition in which a finger catches, clicks, or locks as it bends and straightens. When the thumb is affected, it is called trigger thumb.
The medical term is stenosing flexor tenosynovitis. The problem is primarily mechanical: a tendon that bends the finger no longer moves smoothly through part of its supporting tunnel. Symptoms can range from mild soreness in the palm to a finger that needs help straightening or becomes stuck in one position.
Treatment depends on the severity and duration of symptoms, the finger or thumb involved, and how much the condition interferes with daily life.
What causes a finger to trigger?
The tendons that bend the fingers travel through a series of supporting bands called pulleys. These pulleys hold the tendons close to the bones as the fingers move.
The A1 pulley sits near the base of each finger, where the finger meets the palm. A similar pulley surrounds the tendon that bends the thumb.
When the pulley thickens or the tendon becomes enlarged, there may no longer be enough room for smooth movement. A localized thickened area in the tendon, often called a flexor tendon nodule, can add to this mismatch.
As the finger moves, the enlarged tendon may catch at the tight opening and then suddenly slip through. This produces the characteristic click or release.
What does trigger finger feel like?
Common symptoms include:
- Pain or tenderness in the palm at the base of a finger or thumb
- Stiffness, especially in the morning
- Clicking, catching, or popping with movement
- A finger that becomes stuck in a bent position
- The need to use the other hand to straighten the finger
- A tender lump near the base of the finger
- Difficulty gripping tools, carrying bags, or holding exercise equipment
Some patients have soreness before any obvious catching develops. Others notice painless clicking first. Symptoms may vary from day to day and are often worse after sleep, inactivity, or repeated gripping.
As the condition advances, the finger may become increasingly difficult to straighten or remain locked.
Which fingers can be affected?
Any finger can develop triggering. The ring finger, middle finger, and thumb are commonly affected. More than one finger may be involved, and symptoms can occur in both hands.
Trigger thumb involves the flexor pollicis longus tendon, which bends the tip of the thumb. Pain and catching often occur near the palm-side crease at its base.
Why does trigger finger develop?
Many patients have no single identifiable cause. Trigger finger becomes more common with age and is seen more often in women. Diabetes and rheumatoid arthritis are associated with the condition, and it may occur alongside other hand problems, including carpal tunnel syndrome.
Repeated or forceful gripping can aggravate symptoms. However, noticing triggering after lifting, gardening, exercise, or tool use does not establish that the activity was the sole cause.
People with diabetes are more likely to develop trigger finger and may have several fingers involved. The implications for corticosteroid injections are discussed below.
How is trigger finger diagnosed?
Diagnosis usually begins with the history and physical examination.
The examiner checks where the finger is tender, how it bends and straightens, and whether catching or thickening can be felt over the A1 pulley. The finger does not have to trigger during the appointment: intermittent symptoms may still follow a characteristic pattern.
X-rays, ultrasound, MRI, and nerve studies are not routinely needed. Imaging may help when symptoms are unusual, there has been an injury, or another explanation is being considered.
Could it be something else?
Not every painful or stiff finger is a trigger finger. Arthritis, tendon injury, Dupuytren disease, joint stiffness, and infection can cause overlapping complaints. Pain near the thumb may also come from arthritis at its base.
A finger that suddenly cannot bend after an injury needs evaluation for tendon damage. Redness, warmth, marked swelling, or rapidly worsening pain may suggest infection rather than routine triggering.
Can trigger finger improve without treatment?
Some cases improve with time. A period of observation may be reasonable when symptoms are mild, motion is maintained, and daily activities remain manageable.
Persistent pain, repeated locking, or increasing difficulty straightening the finger should prompt evaluation. Long-standing triggering can be accompanied by joint stiffness. Once that stiffness is established, treating the tendon problem may not immediately restore full motion.
What can be tried without surgery?
Nonsurgical care is often appropriate when symptoms are recent or manageable and the finger is not fixed in a locked position.
Activity modification
Temporarily reducing forceful gripping or adjusting activities that reliably provoke symptoms may help. The goal is to make practical changes while preserving comfortable hand use.
Splinting
A splint can limit the movement that produces catching and may be especially useful at night. The type of splint and how long it is worn depend on the finger or thumb involved and the pattern of symptoms.
The splint should fit comfortably. A plan for gentle movement helps avoid unnecessary stiffness.
Medication
Anti-inflammatory medication may reduce pain when medically appropriate, but it does not directly correct the tight opening around the tendon.
Corticosteroid injection
A corticosteroid injection is placed around the flexor tendon near the A1 pulley to reduce local tissue irritation and improve gliding. It is not intended to be injected into the tendon itself.
Many patients improve after one injection, although symptoms can return. Relief may begin within days and continue to develop over the following weeks. Lasting benefit varies among patients. 2.
If symptoms persist or return, another injection may be reasonable. Repeat injections provide durable relief for some patients, while others ultimately choose surgery. The response to the first injection, symptom severity, and patient preferences help guide that decision. 3.
Diabetes deserves additional consideration. Some studies report lower injection success in patients with diabetes, although an injection can still help. Corticosteroid can also temporarily raise blood glucose. Patients should discuss monitoring and any necessary management plan with their treating clinicians. 5.
Other risks include a temporary flare of pain, skin color change, thinning of tissue beneath the skin, infection, and injury to nearby structures. Flexor tendon rupture is rare.
When is surgery considered?
Surgical release may be considered when:
- Pain or catching remains disruptive despite nonsurgical care
- Symptoms return after initially improving
- The finger repeatedly locks or becomes difficult to straighten
- Stiffness is progressing
- Symptoms substantially interfere with work or daily activities
- A patient prefers a more definitive treatment after discussing the alternatives
Surgery may be considered earlier for a finger that is fixed in a locked position. Not everyone needs several injections before surgery, and not every recurrence requires an operation.
What happens during trigger finger release?
The aim is to allow the flexor tendon to move through the tight area without catching.
The surgeon divides the A1 pulley while protecting the tendons and nearby nerves and blood vessels. The remaining pulley system is preserved to keep the tendons close to the bones during finger motion.
Release is usually an outpatient procedure and can often be performed using local anesthesia. Sedation or other anesthesia may be used depending on the patient, technique, and setting.
Open and percutaneous trigger finger release
Both techniques aim to release the A1 pulley safely and completely. A randomized trial found both approaches effective, but selecting a technique also requires attention to anatomy and surgeon experience. 6.
Open release
A small incision is made in the palm near the base of the finger or thumb. This allows the surgeon to see the pulley directly and protect the surrounding structures while dividing it.
The incision may be tender or sensitive to pressure as it heals. Direct visualization is an advantage of this approach.
Percutaneous release
The pulley is divided using a needle or specialized instrument introduced through the skin, without a traditional open incision. Ultrasound guidance may be used to identify the pulley, tendon, and nearby structures.
A smaller skin opening may reduce early wound discomfort. However, the structures are not directly exposed. Without ultrasound, the release relies on surface landmarks and tactile feedback; with ultrasound, safety also depends on clear imaging and experience interpreting it.
Incomplete release, tendon injury, and injury to a nearby digital nerve remain concerns. Nerve position matters, particularly in the thumb. Suitability depends on the specific anatomy, equipment, and experience of the treating surgeon.
What is recovery like?
Finger movement usually begins soon after surgery. Gentle early motion helps maintain tendon gliding and limits stiffness.
Light hand use often resumes early, while forceful gripping, heavy lifting, and pressure over the incision require more time. Swelling, bruising, and tenderness can occur. After open release, the scar may feel firm or sensitive before it gradually settles.
Return to work depends on what the hand needs to do. Desk work and light tasks place different demands on a healing hand than repeated tool use, procedural work, or heavy manual labor.
Hand therapy is not necessary after every uncomplicated release. It may help when stiffness, swelling, scar sensitivity, or limited movement slows recovery.
Will the triggering stop immediately?
The catching often resolves during the procedure. Pain, swelling, and stiffness may improve more gradually.
A finger that was stiff before surgery may not straighten fully right away. Time, stretching, or hand therapy may be needed, and some advanced cases retain a degree of lost motion even after the triggering is corrected.
What are the risks of surgery?
Trigger finger release generally provides dependable relief, but an operation cannot guarantee a particular outcome. Published surgical series report high rates of symptom resolution. 7.
Possible complications include:
- Infection or wound-healing problems
- Bleeding
- Persistent scar tenderness, swelling, or pain
- Finger stiffness
- Injury to a nerve, blood vessel, or flexor tendon
- Incomplete release or recurrent triggering
- Problems with tendon gliding
- Excessive pulley release causing bowstringing, in which the tendon pulls away from the bones
- Need for additional treatment or surgery
The risks depend in part on the technique, underlying health, and condition of the finger before treatment.
Is trigger thumb in a child the same condition?
Pediatric trigger thumb differs from adult trigger thumb. It is often noticed during the toddler years, although the age at presentation varies.
The tip of the thumb may remain bent, and a firm thickening called a Notta nodule may be felt near its base. A child may have little pain and no obvious clicking.
Some pediatric trigger thumbs improve with observation, sometimes over several years. The amount of lost extension, whether the thumb is flexible or fixed, the child’s age, and the effect on function all influence treatment. Persistent deformity may be treated with surgical release. 8.
A child with a bent or triggering thumb should be evaluated using pediatric considerations rather than the adult treatment pathway described here.
When should I seek evaluation sooner?
Arrange an evaluation if the finger repeatedly locks, becomes increasingly difficult to straighten, or interferes substantially with daily activities. A finger that becomes stuck should be assessed rather than repeatedly forced straight.
Seek prompt medical attention for new loss of movement after an injury, or for redness, warmth, rapidly increasing swelling, or severe pain—especially after a cut, puncture, or bite. These findings can indicate a problem other than routine trigger finger.
The central question
For one patient, trigger finger is an occasional painless click. For another, it means waking with a locked finger or struggling to grip an instrument throughout the day.
An evaluation should establish how advanced the condition has become, whether another problem is contributing, and which treatment offers the best balance of symptom relief, recovery, and disruption to daily life.
For some people, that means observation, activity modification, splinting, or an injection. For others, release of the pulley offers a dependable path back to smoother and more comfortable movement.
Evidence and further reading
- American Academy of Orthopaedic Surgeons. Trigger Finger—Trigger Thumb. OrthoInfo patient resource.
- Wojahn RD, Foeger NC, Gelberman RH, Calfee RP. Long-term outcomes following a single corticosteroid injection for trigger finger. Journal of Bone and Joint Surgery American Volume. 2014;96(22):1849–1854.
- Dardas AZ, VandenBerg J, Shen T, Gelberman RH, Calfee RP. Long-Term Effectiveness of Repeat Corticosteroid Injections for Trigger Finger. Journal of Hand Surgery American Volume. 2017;42(4):227–235.
- Baumgarten KM, Gerlach D, Boyer MI. Corticosteroid injection in diabetic patients with trigger finger: a prospective, randomized, controlled double-blinded study. Journal of Bone and Joint Surgery American Volume. 2007;89(12):2604–2611.
- Wang AA, Hutchinson DT. The effect of corticosteroid injection for trigger finger on blood glucose level in diabetic patients. Journal of Hand Surgery American Volume. 2006;31(6):979–981.
- Sato ES, Gomes dos Santos JB, Belloti JC, Albertoni WM, Faloppa F. Treatment of trigger finger: randomized clinical trial comparing the methods of corticosteroid injection, percutaneous release and open surgery. Rheumatology. 2012;51(1):93–99.
- Turowski GA, Zdankiewicz PD, Thomson JG. The results of surgical treatment of trigger finger. Journal of Hand Surgery American Volume. 1997;22(1):145–149.
- Chew EM, et al. The natural history of paediatric trigger thumbs: a prospective cohort study. Journal of Hand Surgery European Volume. 2025. First published online November 13, 2024.
This page provides general educational information and is not a substitute for an individual medical evaluation. Treatment recommendations depend on each patient’s symptoms, examination, health, and diagnostic findings.
Written by Daniel R. Bowles, MD | Orthopaedic surgeon with fellowship training in hand and upper extremity surgery
Last reviewed: September 2026