I think everyone at some point in their life has had a case of indigestion, heartburn or abdominal bloating. However, when it gets to be something that is interferring in your normal everyday life it really becomes a problem. I know that my constant upset stomachs from the GERD caused some bloating and a hard type feeling with my stomach, too! Though this could be from other things - Here's a link that I thought explained this well!
Hoping you feel better soon!
"Because he is he and I am I."......E. V. Lucas