How would i be able to tell if i have a stomach ulcer?

Look for the signs: Many patients describe it as a burning or gnawing feeling between the bellybutton and the chest. The stomach upset caused by ulcers typically lasts anywhere from a few minutes to several hours and may be temporarily relieved by taking antacids. Foods that are high in acid, such as citrus fruits, tomatoes, and coffee, may exacerbate ulcer pain; alcohol can also make ulcers hurt more. See your doc.