A common term also known medically as dyspepsia covering a range of symptoms brought on by eating, including abdominal pain, heartburn, flatulence, and nausea.
Discomfort in the upper abdomen is often caused by eating too quickly, eating too much, or by eating very rich, spicy, or fatty foods. Constant or recurrent indigestion can be caused a peptic ulcer, oesophagitis (inflammation of the oesophagus), gallstones, or unusually stomach cancer. Antacid drugs can help to alleviate the symptoms, but they can mask an underlying cause that requires medical attention. They should not be consumed for longer than two weeks without proper medical advice.