Many other conditions may cause symptoms similar to those of a peptic ulcer. These conditions may include:

• Nonulcer dyspepsia.
• Gallstones.
• Gastroesophageal reflux disease (GERD).
• Irritable bowel syndrome (IBS).
• Crohn's disease.
• Inflammation of the pancreas (pancreatitis).
• Infection with certain parasites, such as giardiasis.
• Infection with certain viruses, such as cytomegalovirus (CMV).
• Stomach cancer.
• Lymphoma.
• Psychiatric disorders.
• Other digestive diseases and conditions that cause impaired digestion and malabsorption, such as celiac disease.