In reply to Mord:
"Inside of the elbow" usually means epicondylus medialis, the bit chronically inflamed in climbers/golfers elbow. It is the bony structure where the tendons of a whole bunch of lower arm muscles connect to the bone, which obviously can also get strained acutely. Typically, the soft part just distal to the bony point on the inside (where you can feel the spearate tendons) would then be pressure sensitive.
CB