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Finger dislocation, also called a finger jam, is a common injury. It occurs when the bones of the finger are moved (dislocated) from their normal position. A dislocated finger can occur in any of the joints of any finger, but it occurs most often in the middle knuckle of the little, ring, middle, or index finger.
SYMPTOMS AND SIGNS. 1  You will feel immediate pain over the dislocated finger joint. 2  You will notice swelling shortly after your injury. 3  Your finger will be bent, crooked or have a large lump next to a cavity or step-off over the dislocated joint. 4  There may be numbness and tingling along the sides or at the tip of your finger.