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Trigger finger, also known as stenosing tenosynovitis, is pain or stiffness when straightening or bending the finger.
Swelling of the tendon lining (a tunnel in which the tendons glide to bring about motion) lessens the gliding motion of the tendons, causing finger joint pain or a 'catching' feeling when you try to flex your finger. This condition may also cause the finger to become locked or stuck in a bent position.
Also called trigger thumb, trigger finger usually affects those who perform repetitive gripping movements in their line of work or hobby.
The symptoms of trigger finger include:
Tendons are a strong band of fibrous connective tissues that link the muscle to the bone. These tendons are protected by another layer of connective tissues called the tendon sheaths.
When the tendon sheaths on the finger are inflamed, the normal gliding motion of the tendon through the tendon sheath is disrupted. When the tendon sheath is irritated or inflamed for a long period, the tendons can be scarred, thickened and may develop bumps or nodules.
This can interfere with the tendons' movement, which can lead to stiffness and pain in the finger, a condition known as trigger finger.
While the causes of trigger finger are not always clear, they may include:
Factors that put you at risk of developing trigger finger include:
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