What Is Trigger Finger?

Trigger finger occurs when inflammation or thickening develops in the flexor tendon or its surrounding tendon sheath. Under normal conditions, flexor tendons glide smoothly through a narrow tunnel in the finger called the tendon sheath. When irritation develops, the tendon may form a small nodule or the sheath may tighten, preventing smooth movement.

As the tendon passes through the narrowed sheath, it may catch or lock, creating the characteristic triggering sensation.

Trigger finger can affect:

• One or multiple fingers
• The thumb, often referred to as trigger thumb
• One or both hands

The condition most commonly involves the ring finger, middle finger or thumb.

Common Symptoms of Trigger Finger

Symptoms often begin gradually and may worsen over time. Common signs include:

• A catching, clicking or popping sensation when bending or straightening a finger
• Finger stiffness, especially in the morning or after periods of inactivity
• Pain or tenderness at the base of the finger or thumb, often felt in the palm
• A small lump or nodule near the base of the affected finger
• Finger locking in a bent position that may suddenly release
• In severe cases, inability to fully straighten the finger

Stiffness and triggering are often worse after rest and may improve temporarily with movement.

What Causes Trigger Finger?

Trigger finger is typically caused by irritation and inflammation of the flexor tendon sheath. Contributing factors may include:

• Repetitive gripping, grasping or pinching motions
• Prolonged or forceful hand use
• Occupations or hobbies involving repetitive hand activity
• Hand or finger injury
• Medical conditions such as diabetes, rheumatoid arthritis or gout
• Increasing age, particularly over 40
• Female sex, as women are affected more often than men

In many cases, no single cause is identified. Trigger finger often develops due to a combination of risk factors.

How Trigger Finger Is Diagnosed

Trigger finger is usually diagnosed through a physical examination and review of symptoms. During the exam, a hand specialist may:

• Observe finger motion for catching or locking
• Palpate for tenderness or a nodule along the tendon
• Assess finger strength and range of motion
• Identify the involved digit to determine the severity of the condition

Blood sugar testing may be recommended to evaluate for underlying diabetes. Imaging studies such as X-rays are generally not required unless another condition is suspected.

Non-Surgical Treatment Options

Many cases of trigger finger improve with conservative treatment, particularly when addressed early. Non-surgical options may include:

• Activity modification to reduce repetitive hand strain
• Rest and avoidance of aggravating motions
• Splinting, often worn at night, to keep the finger in a straight position
• Nonsteroidal anti-inflammatory drugs (NSAIDs) to reduce pain and inflammation
• Corticosteroid injections into the tendon sheath to decrease swelling and improve tendon movement

Steroid injections are highly effective for many patients and may provide long-lasting relief. Hand therapy and stretching exercises may also be recommended to improve finger mobility.

Surgical Treatment for Trigger Finger

Surgery may be recommended if symptoms persist despite conservative care or if the finger remains locked. The goal of surgery is to release the tightened portion of the tendon sheath so the tendon can glide freely.

Trigger Finger Release Procedure

• Typically performed as an outpatient procedure
• May be done under local anesthesia
• Involves a small incision in the palm or a percutaneous needle technique
• Releases the constricted A1 pulley, allowing the tendon to move freely

Care is taken during the procedure to avoid injury to nearby structures important for finger stability. Surgical treatment is generally effective and allows most patients to regain normal finger motion.

Recovery After Trigger Finger Treatment

Recovery depends on the treatment approach and severity of symptoms.

• Non-surgical treatment: Many patients improve within weeks
• After surgery: Finger motion often improves quickly, with gradual return of strength over several weeks

Hand therapy or exercises may be recommended to restore flexibility and function to the affected finger.

Complications and Prognosis

If left untreated, trigger finger can lead to complications such as fixed flexion contracture, in which the finger becomes permanently bent due to chronic inflammation and scarring. In rare cases, repeated corticosteroid injections may weaken the tendon and increase the risk of tendon rupture, which may require surgical repair.

The prognosis for trigger finger is generally very good, especially when diagnosed early and treated appropriately. Conservative treatments often relieve symptoms, and surgical intervention can provide lasting improvement for patients who do not respond to non-surgical care. Underlying medical conditions such as diabetes or rheumatoid arthritis may influence recovery and recurrence risk.

Preventing Trigger Finger

While trigger finger cannot always be prevented, risk may be reduced by:

• Taking frequent breaks during repetitive hand activities
• Using ergonomic tools and proper hand positioning
• Avoiding prolonged gripping when possible
• Stretching fingers and hands regularly
• Managing underlying conditions such as diabetes

Expert Trigger Finger Care at OrthoTexas

OrthoTexas provides comprehensive care for trigger finger, from early diagnosis and conservative management to advanced surgical treatment when needed. Our orthopedic hand specialists focus on restoring comfortable, reliable finger movement and helping patients return to daily activities without pain.