Finger Tendon Injuries

The fingers and thumbs are responsible for tasks such as grasping, holding, curling, flexing and extending. Tendons in the fingers and thumb connect muscles to bones.


When the muscles contract, the tendons pull on the bones allowing fingers to bend and extend. If the tendon suffers an injury, it can become difficult or impossible for the fingers and thumb to bend or extend. Additionally, an injury to the forearm, wrist or palm, such as a laceration, can affect the tendons which run from the fingers across the wrist into the forearm. This is because tendons are located close to the skin making them vulnerable and easily injured.

Other conditions can weaken the tendons making them susceptible to tearing; which can occur without warning and suddenly leaves the finger without the ability to bend or extend. Rheumatoid arthritis, steroid use, and tendon degeneration from overuse are often causes for this injury. Symptoms include numbness, pain when the finger is bent or extended or the inability to bend the finger completely. 

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