Burning or gnawing pain in the upper abdomen
Pain that may improve or worsen with eating
Bloating
Frequent burping
Nausea
Vomiting
Loss of appetite
Unexplained weight loss
Feeling full quickly
Dark, tarry stools
Vomiting blood or material that looks like coffee grounds
Fatigue or weakness from possible bleeding
Diagnosis by a healthcare professional using a medical history and physical exam
H. pylori testing through breath, stool, or blood tests
Endoscopy to directly view the stomach lining
Blood tests to check for anemia or infection
Stool test for hidden blood
Imaging tests if needed to rule out other causes