Trigger Finger

Condition

Understanding Trigger Finger

Trigger finger is a common hand condition that causes pain, stiffness, and a catching or locking sensation when bending or straightening a finger or thumb. Symptoms often develop gradually and are typically worse in the morning or after periods of rest. In more advanced cases, the finger may lock in a bent position and require manual straightening. Trigger finger can affect adults of any age and is more common in people with diabetes, inflammatory conditions, or those who perform repetitive gripping activities. Many patients seek assessment when symptoms interfere with hand function, work, or everyday tasks, or when simple measures have not improved the problem.

What is trigger finger?

Trigger finger, also known as stenosing tenosynovitis, occurs when the flexor tendon becomes thickened or irritated as it passes through a narrow tunnel (the A1 pulley) at the base of the finger. This impairs smooth tendon movement and leads to pain, clicking, or locking. Inflammation, tendon thickening, and pulley narrowing may all contribute to symptoms, which can vary in severity over time.

Symptoms and functional impact?

Common symptoms include pain or tenderness at the base of the affected finger or thumb, stiffness, and a catching or popping sensation during movement. Locking may be intermittent or persistent in more advanced cases. Trigger finger can significantly impair grip strength and fine motor tasks such as writing, typing, or buttoning clothes. Symptoms are often worse in the morning or after inactivity..

Assessment and diagnosis

Diagnosis is usually clinical and based on a characteristic history and examination. Imaging is rarely required. Assessment focuses on identifying the affected digit, the degree of locking, symptom duration, and any contributing factors such as diabetes or inflammatory disease. Differentiating trigger finger from other causes of hand pain or stiffness helps guide appropriate treatment.

Treatment options

Initial management may include activity modification and short-term splinting. Corticosteroid injection into the flexor tendon sheath has good evidence for symptom relief and is considered first-line treatment for many patients. A single injection is often effective, although some patients may require a repeat injection.

Focused shockwave therapy (FSWT) has a limited evidence base in trigger finger and may be considered in selected cases where symptoms persist or where patients wish to avoid injection or surgery. Surgical release of the A1 pulley is reserved for patients with persistent or severe symptoms despite non-operative treatment.

Frequently Asked Questions

FAQ – Trigger Finger

What causes trigger finger?

Trigger finger is caused by thickening or irritation of the flexor tendon and its surrounding pulley, leading to impaired tendon movement. It is more common in people with diabetes, inflammatory conditions, and those who perform repetitive gripping activities.

Can trigger finger improve without treatment?

Mild cases may improve, but persistent locking or pain usually requires treatment to prevent progression.

Is a steroid injection safe?

When performed appropriately, corticosteroid injections are generally safe and effective for trigger finger.

How effective are steroid injections?

Steroid injections are effective in a high proportion of patients, particularly in early or moderate disease. Effectiveness may be lower in long-standing or diabetic cases.

How many injections can I have?

Some patients benefit from a second injection if symptoms recur, but repeated injections are not usually recommended if symptoms persist.

What happens if an injection doesn’t work?

If symptoms persist despite injection, surgical release is often the most effective next step.

Is shockwave therapy proven for trigger finger?

Evidence is limited. It may help some patients, but results are variable and it is not a standard first-line treatment.

When is surgery recommended?

Surgery is considered for patients with persistent locking or pain despite appropriate non-operative treatment.

Is surgery permanent?

Surgical release is usually definitive, with a high success rate and low risk of recurrence.

Do I need physiotherapy before seeing you?

No. Physiotherapy has a limited role in trigger finger. We will advise if any additional measures are likely to be helpful.

Can more than one finger be affected?

Yes. Trigger finger can affect multiple fingers, either at the same time or sequentially.

Why choose Northern Medical Practitioners?

Patients with trigger finger are assessed at Northern Medical Practitioners by experienced clinicians with a focus on accurate diagnosis and appropriate escalation of care. We prioritise treatments with the strongest evidence of benefit and are clear about expected outcomes and limitations. Where non-operative treatments are unlikely to provide lasting improvement, we advise timely referral for surgical opinion rather than prolonged ineffective intervention.