Knowing that some of you guys are avid sportsman, health freaks and the like, I figured I'd post my question here to see what you say. I have an appointment to see my doc tomorrow morning, but I just discovered a golf ball size bump on my right (dominant) bicep. It is about three inches or so above the bend in the arm (elbow) on top of my bicep. It does not hurt when i press on it, or when i use my arm. I've read about ruptures, bruises, etc, all would seemingly have more pain. Then, of course, i get nervous about any lump at all being tumor related, but I only just felt it today. Could it have been there a while? I suppose, but at the size of a golf ball?? I am active in jujitsu and had a rough Katana class last night (sword) so maybe it could be that? I thought I'd plug into the ET hive mind and see what came up.