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(630) 584-1400Trigger finger, or stenosing tenosynovitis is a hand disorder limiting movement in one or more fingers. As a finger is extended, the condition interferes with fluid movement, causing the joints to “hang-up” or lock during the motion. When trigger finger is present, tendons in the fingers and thumb are responsible for fingers “catching” or getting stuck in a bent position. In most cases, the finger continues to move beyond the momentary restriction, but some fingers affected by the condition remain locked in a bent position.
The cause of trigger finger isn’t always known, but several risk factors have been identified for developing the condition:
Specialized tendons attach muscles to bones in the fingers. These long, flexor tendons extend from the forearm muscles, passing through the wrist, before connecting to fingers and thumbs. As they contract, the flexor tendons pull on the bones, facilitating movement. When trigger finger strikes, inflammation interferes with the tissue sleeve (tendon sheath) surrounding tendons of the affected finger, causing it to catch or lock.
As the irritation continues, the tendon thickens and the sheath tunnel narrows, further impinging the tendon’s passage. In severe cases, the affected finger becomes fixed in a bent position.
Trigger finger may present the following symptoms:
Contact our hand specialists at Fox Valley Orthopedics today.
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