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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.
Types of Dislocated Fingers. 1  PIP dislocation or proximal interphalangeal joint dislocation is the commonest type of finger dislocation, which occurs in the first finger joint from the knuckles. 2  DIP dislocation or distal interphalangeal joint dislocation occurs in the finger joint near the nail. It is commonly seen in patients of finger arthritis due to age or rheumatoid arthritic deformities.