Pain when I run?

I get a really sharp pain 3 inches from my belly button, to the left but only happens when I run. I have started to work out but I have stop now. Does anyone know what is it? I don't think it is muscle.
 
I've been a runner for a long time and I've never heard of this kind of pain unless it's a bad cramp. I'd get it checked out pronto.
 
Back
Top