Olecranon bursitis (also informally known as `elbow bump`, `student`s elbow`, `popeye`s elbow`, or `baker`s elbow`, is a condition characterized by pain, redness and swelling around the olecranon, caused by inflammation of the elbow`s bursa. This bursa is located just over the extensor aspect of the extreme proximal end of the ulna. In... Found on http://en.wikipedia.org/wiki/Olecranon_bursitis