It hurts medially, and now that I'm researching a little, whatever in my upper arm that connects to the ulna is what hurts.
so if I hold my left arm out in front of me and bend my elbow up a soft 90 degrees, i can push a finger/thumb up in the flesh spot on the inside/underside of my upper arm and feel the end of the ulna. it's that area that hurts.
pressing on it a lot makes my hand a little tingly/numb.
