The most common symptom of an ulcer is a burning pain in the stomach, between your breastbone and your belly button. You will often feel this pain when your stomach is empty, between meals generally, but it can occur at any time. Sometimes this pain will wake you in the middle of the night. The pain will last anywhere from a few minutes to several hours.
While not as common as stomach pain, other symptoms include nausea, vomiting, or blood in the stool. Bleeding may be the first and only symptom of an ulcer. When an ulcer bleeds and continues to bleed without treatment, a person may become anemic and weak.