Peripheral | Common conditions |
Gastrointestinal | Distension, gastro-oesophageal reflux disease, gastritis, peptic ulcer disease, pancreatitis, gallbladder disease, hepatitis, aerophagia, bowel obstruction, neoplasm |
Non-gastrointestinal | Thoracic (myocaridal infarction, pericarditis, aortic aneurysm, pneumonia, bronchitis, tuberculosis), neoplasm, rhinitis, otitis, pharyngitis |