I just got diagnosed with erosive esophagitis (erosions on lining of esophagus) caused by acid reflux. Before I started Nexium, I had extreme pain in stomach (burning/aching) whenever I was hungry. I found myself eating to alleviate the pain, however, my acid reflux would flare up after eating. It was a vicious cycle. I had an endoscopy to diagnose my problem and my stomach was fine--I was expecting an ulcer due to the pain when my stomach was empty. So, apparently, there are numerous causes of this pain. You may want to go see a specialist to get the right medication. I feel much better now that my pain is gone.