If your doctor suspect that you have ulcer disease, you probably have epigastric pain with or without nausea or vomiting, pain which are relieved or aggravated by food or antacids (depending on the type of ulcer), pain that occasionally penetrates to the back and more ominously vomiting blood, passing black stools or weight loss.
Your Gastroenterologist will probably request for a blood test and probably a gastroscopy ( which involve introducing a scope through the mouth, passing by the oesophagus, into the stomach and subsequently into the duodenum). The whole process takes only 5 minutes and during that time the doctor will look for lesions including inflammation, ulcers, growths, swellings, abnormal blood vessels and obtain stomach wall tissues for analysis if necessary. Gastric tissues will also be taken to check for the presence of Helicobacter Pylori infection.
if you have ulcers (either oesophageal, gastric or duodenum) then the endoscopy will detect the lesion.