Hand and finger injuries are very common in athletes (9% of all sports injuries).
The fingers of the human hand are all hinge joints with flexing or extending. The interphalangeas (fingers) are formed of three hinge joints, apart from the thumb, which is formed by only two.
Dislocation /Subluxation of the finger or thumb is typically associated with forced hyperextension or hyperflexion of the digit and requires immediate reduction. Common reasons for a luxation or subluxation of the finger joints are: indirect blow or landing on the hand, finger or thumb (Safran, Zachazewski and Stone, 2013).
As part of the management the finger may be splinted in a slightly bent position (Zimmer splint) for 2-3 weeks or by buddy taping (taping the affected finger together with an uninjured finger) (Skelley, McCormick and Smith, 2014). If the finger /thumb is stable the joint can be mobilised after pain and swelling have settled (3-5 days).
Skelley N.W., McCormick J.J. and Smith M.V., 2014, In-game Management of Common Joint Dislocations, Sports Health, 6(3), pp: 264-255
Safran M.. Zachazewski J. and Stone D.A., 2013, Instructions for Sports Medicine Patients E-Book, Elsevier Saunders, 2nd Edition, Philadelphia, PA, p: 398