Indigestion encompasses a range of complaints including nausea, vomiting, heartburn, regurgitation, and dyspepsia (symptoms thought to originate in the gastroduodenal region).
Some individuals with dyspepsia experience postprandial fullness, early satiety (inability to complete a meal due to premature fullness), bloating, eructation (belching), and anorexia.
Others report predominantly epigastric burning or pain.
Nausea, vomiting, and dyspepsia have been correlated with a condition now called avoidant/restrictive food intake disorder.