I don't think AAS can, but you should see a physician. If you have an ulcer, you need to be tested for a bacteria called Helicobactr pylori. A doctor should examine you though because it might not be your stomach. Your gallbladder, liver, spleen, and pancreas can all give you pain in your epigastrium (stomach area). Even your heart and lungs can refer pain to your epigastrium. (This is why we get EKG's on most people with epigastric pain.)