Dyspepsia is common and describes a range of upper gastrointestinal tract symptoms, e.g. epigastric pain or burning, nausea, heartburn, fullness, and belching. Patients are likely to use the term ‘indigestion’ for these symptoms. Dyspeptic symptoms are caused by disorders of the esophagus, stomach, pancreas, or hepatobiliary system, but the most common cause is functional dyspepsia….