An injury to the tendon or ulnar nerve at the base of the thumb. It can lead to a thickening and scarring of the connective tissue around the nerve. Bowler's thumb is common in tenpin bowlers who attempt to spin the ball by retaining the thumb in the thumbhole until the last possible moment before release. This action puts great strain on the tendons and ulnar nerve. It may be a transient condition, which resolves itself after a rest from bowling, but it can result in permanent damage to the nerve. Bowler's thumb can be avoided by widening the thumb hole, changing technique, or padding the thumb.
Subjects: Sports and Exercise Medicine.