The injury occurs primarily in football, rugby, and other high-contact sports. The ring finger is injured in about 75% of cases.
(See also Mallet Finger Mallet Finger In Mallet finger, the fingertip curls down and cannot be straightened. It is usually caused by a tendon injury. (See also Overview of Sprains and Other Soft-Tissue Injuries and Finger Fractures... read more .)
Causes of Jersey Finger
Tendons that originate in the forearm control the fingers' ability to grip things. One of those tendons (flexor digitorum profundus [FDP]) flexes the fingertip (toward the palm).
In jersey finger, the tendon that attaches the FDP to bone is torn away from its point of attachment near the fingertip. A small piece of bone may break off.
Symptoms of Jersey Finger
The injured finger cannot flex at the fingertip. The other joints are not affected. The fingertip is painful when touched and may be swollen. The affected finger remains slightly more extended (bent away from the palm) than other fingers while in a resting position.
Diagnosis of Jersey Finger
Doctors carefully evaluate the person's ability to flex the fingertip. They take x-rays of the finger to determine if the tendon has torn off any bone.
Treatment of Jersey Finger
Surgically repairing the tendon is needed to restore the ability to flex the fingertip. Such surgery is usually best done by a hand specialist.