Pain but no fracture
A bone bruise is a diagnosis of exclusion -- meaning that you need to rule out that it is broken.
Once that is done, and the injury was hard enough to hit the bone -- then you have a bone bruise. There are certain nuances to that but that is the basic idea.
I practice in bingham farms -- performance orthopedics (www.Performanceorthopedics.Com). I would be happy to see you.