It can happen when one player grabs another's jersey and a finger (usually the ring finger) gets caught and pulled with great force. Jersey finger is one of the most common of these sports injuries. These injuries often occur in football, wrestling, and rugby. In addition to cuts on the arm, wrist, hand, or fingers, certain sports activities can cause flexor tendon injuries. Partial injuries t othe tendons can be difficult to diagnose. However, partial tendon injuries may result in incomplete bending of the finger, excessive pain, or even catching or locking of the finger during movement.
With a partial tendon injury, it may still be possible to bend your finger. Occasionally, flexor tendons may be partially cut or torn. If blood vessels are also cut, the finger may have no blood supply, which can cause loss of the finger. This can cause numbness on one or both sides of the finger. Because the nerves and blood vessels to the fingers are very close to the tendons, a cut may damage them, as well. It is not uncommon for other structures to be injured at the time of a cut flexor tendon.
If a tendon is torn or cut, the ends of the tendon likely will be pulled apart, making it impossible for the tendon to heal on its own because of the gap between the two ends. Like a rubber band, the flexor tendons are under tension as they connect the muscle to the bone. A cut or ruptured tendon in the forearm, at the wrist, in the palm, or along the finger will make it difficult or maybe impossible to bend one or more joints in a finger.
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