M65.35 Trigger finger, little finger

Name of the Condition

• Trigger finger, little finger

Summary

Trigger finger, little finger is a condition where the little finger catches or locks in a bent position, often due to inflammation or thickening of the flexor tendon sheath. This can cause pain, stiffness, and difficulty straightening the affected finger. The condition may be acute or chronic and typically affects the little finger specifically.

Causes

Inflammation or thickening of the flexor tendon sheath, often due to repetitive motion or overuse. Underlying conditions such as diabetes or rheumatoid arthritis. Trauma to the hand or little finger. Age-related degenerative changes in the tendon or sheath.

Risk Factors

• Repetitive hand or finger movements (e.g., typing, gripping tools)
• Diabetes or other metabolic disorders
• Rheumatoid arthritis or other inflammatory conditions
• Female gender and increasing age
• Prior hand or finger injuries

Symptoms

• Little finger catching or locking in a bent position
• Pain or tenderness at the base of the little finger
• Stiffness, especially in the morning
• A popping or clicking sensation when moving the little finger
• Difficulty straightening the little finger without assistance

Diagnosis

Diagnosis typically involves a physical examination to assess finger movement and tenderness. The provider may ask the patient to open and close the hand to observe locking or catching. Imaging studies like ultrasound may be used to evaluate tendon sheath inflammation or structural changes.

Treatment Options

• Rest and activity modification to reduce strain on the finger
• Nonsteroidal anti-inflammatory drugs (NSAIDs) to manage pain and inflammation
• Corticosteroid injections into the tendon sheath to reduce swelling
• Physical therapy to improve finger mobility and strength
• Surgical release of the tendon sheath if conservative treatments fail

Prognosis and Follow-Up

Most cases improve with conservative treatment, though recovery may take weeks to months. Surgical intervention often provides rapid relief but requires postoperative care. Follow-up appointments monitor healing and functional recovery, with adjustments to treatment as needed.

Complications

• Persistent stiffness or locking despite treatment
• Tendon rupture or damage from chronic inflammation
• Recurrence of symptoms after treatment
• Reduced hand function or dexterity

Lifestyle & Prevention

• Use ergonomic tools and proper hand positioning during activities
• Take regular breaks during repetitive tasks
• Perform hand exercises to maintain flexibility and strength
• Manage underlying conditions like diabetes to reduce risk
• Avoid excessive gripping or forceful hand movements

When to Seek Professional Help

Seek medical attention if symptoms worsen, interfere with daily activities, or do not improve with home care. Prompt evaluation is recommended for severe pain, inability to move the finger, or signs of infection (e.g., redness, swelling, fever).

Tips for Medical Coders

Document the specific finger affected (little finger) and any contributing factors like trauma or underlying conditions. Ensure clinical notes support the diagnosis and specify whether the condition is acute or chronic. Include details on treatment approaches and response to therapy for accurate coding.