Trigger finger, also known as stenosing tenosynovitis, is a condition that affects the tendons in the fingers. It occurs when the tendon sheath becomes inflamed, causing the finger to catch or lock in a bent position. This can lead to pain, stiffness, and difficulty straightening the affected finger. Trigger finger is often associated with repetitive hand movements, underlying health conditions like diabetes, and can affect people of all ages. Treatment options include rest, splinting, anti-inflammatory medications, and in some cases, corticosteroid injections or surgery.

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