Burning or gnawing pain in the upper abdomen
Pain that may improve or worsen after eating
Stomach pain that comes and goes, especially at night
Bloating or feeling unusually full
Frequent burping
Nausea or vomiting
Loss of appetite
Unexplained weight loss
Black, tarry stools
Vomiting blood or material that looks like coffee grounds
Feeling weak, dizzy, or faint
Symptoms that persist or keep returning
A medical evaluation is needed to confirm an ulcer