Skip to content
Trigger Finger

Trigger Finger

Trigger Finger (Stenosing Tenosynovitis): Causes, Symptoms, and Treatment

Stenosing tenosynovitis, commonly known as trigger finger or trigger thumb, occurs when a finger or thumb gets stuck in a bent position and then “pops” out when released, much like releasing a trigger. This condition involves the tendons in the hand that bend the finger. The tendons act like a pulley system, with “ropes” connecting the forearm muscles to the bones of the fingers and thumb. If the pulley at the base of the finger becomes too thick or constricted, it can prevent the tendon from moving freely, causing the finger to get stuck and snap back when it is freed. This cycle can lead to inflammation, pain, and difficulty in straightening or bending the finger.

What Causes Trigger Finger?

The exact cause of trigger finger is not fully understood, but several factors can contribute to its development. These include:

  • Rheumatoid arthritis: A condition that can cause inflammation of the joints, including the tendons in the fingers.
  • Gout: A form of arthritis that may affect the tendons and joints in the fingers.
  • Diabetes: People with diabetes may be more prone to developing trigger finger.
  • Local trauma: Injury or repetitive stress to the area may also trigger the onset of this condition.
Symptoms of Trigger Finger

Common symptoms of trigger finger include:

  • Discomfort at the base of the finger or thumb
  • Tenderness upon localized pressure
  • Inflammation of the affected finger or thumb
  • Stiffness, making movement difficult
  • A nodule (lump) may appear on the middle finger or tip knuckle of the thumb
Treatment for Trigger Finger

The goal of treatment is to alleviate the catching of the finger and allow for full movement without discomfort. Treatment options may include:

  • Splinting: Wearing a splint to immobilize the affected finger or thumb.
  • Anti-inflammatory medication: To reduce inflammation in the area.
  • Activity modification: Changing activities to reduce further swelling and irritation.
  • Surgery: If non-invasive treatments do not relieve symptoms, surgery may be recommended to release the constricted tendon.

If you suspect that you have trigger finger, it is important to seek treatment from a specialist at South Florida Hand and Orthopaedic Center as soon as possible to prevent further pain or injury.

Related Conditions