Heartburn is a burning sensation in the front chest, just behind the breastbone or in upper central abdomen. Indigestion is a condition of impaired digestion. Symptoms of indigestion may include upper abdominal fullness, heartburn, nausea, belching, or upper abdominal pain. Indigestion is often a sign of an underlying problem, such as gastroesophageal reflux disease (GERD), peptic ulcer, or gallbladder disease.
By answering questions about your condition, you can find the causes.