A joint is where 2 bones meet. [1] Our elbow is a hinge joint made up of the humerus which is the bone of the upper arm, the ulna which is the bone that runs from the your elbow to the tip of your pinky finger at the side of your wrist, and the radius which is the lower arm at the other side of the ulna.[2] The elbow joint can be permanently damaged through frequent sports injuries such as bad spr