Metacarpal-Phalangeal Joint Dislocations refer to fingers whose first knuckle has been knocked out of place due to a sudden force such as landing on an outstretched hand during a fall common in such sports as skiing, snowboarding, skating, football or basketball.

Thumb and index finger Metacarpal-Phalangeal Joint Dislocations are more common than that of other digits due to their lack of shielding from other fingers. Isolated Metacarpal-Phalangeal Joint collateral ligament rupture can occur at any joint and lead to painful grasp due to instability.

Manipulating the joint back into alignment and splinting normally treats dislocations, although unresponsive cases may demand surgery.