Im sorry, were you trying to type something?
Does it hurt when you push against the side or top of the bone directly above that meaty area? Or just from underneath? If it hurts when you push on the bone, then you might be looking at a stress fracture. If it just hurts when you push against the meat, you are more likely to be looking at a bruise or sprain.
Ive never really heard of that area hurting before, just the arches. Definitely look into getting some new shoes, though.
Do you run up on your toes, or do you hit with your heel?