Trigger Finger

Trigger finger

Trigger finger, also known as stenosing tenosynovitis, is a disorder characterized by catching or locking of the involved finger. Pain may occur in the palm of the hand or knuckles. The name is due to the popping sound made by the affected finger when moved. Most commonly the index finger or thumb is affected.

Trigger finger is relatively common. Females are affected more often than males. Those in their 50s and 60s are most commonly affected.

Risk factors include repeated injury, diabetes, kidney disease, thyroid disease, and inflammatory disease. The underlying mechanism involves the tendon sheath being too narrow for the flexor tendon. This typically occurs at the level of the A1 pulley. While often referred to as a type of stenosing tenosynovitis, little inflammation appears to be present.

Diagnosis is typically based on symptoms after excluding other possible causes.

Treatment

is generally with rest, splinting the finger, NSAIDs, or steroid injections. If this is not effective Surgery may be used.

Further Reading