Conditions and Diseases
Digestive System

What is indigestion and what causes it?

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Wiki User
02/26/2007

Indigestion, also know as heartburn is an irritation of the lining of the stomach, and/or duodenum (first part of small intestine). This can be caused by stress, nicotine, illness, caffiene, and alcohol. Certain medications can also cause this symptom, in particular aspirin, non-steroidal anti-inflammatory drugs such as Advil, Naprosyn, Alleve, etc.