Staple Line Question

I just have a general question that may sound kind of odd. But could someone respond back to me with your thoughts? What symptoms would a person experience if there is a problem with their staple line? I had my surgery in 2011. I have been doing fairly well but experiencing pain in my stomach. I realize this is very general, because pain in the stomach could be from a number of things. But I would like to specifically ask the question. Thanks, and I appreciate your replies in advance.

Monica