FACTS ABOUT INDIGESTION   Indigestion describes the discomfort that you feel after a meal. It is medically referred to as "dyspepsia". Most people have experienced indigestion before. But for some people, the discomfort may continue for days and even weeks.     What are the symptoms?     What causes indigestion?     What can be done?     How should I change my lifestyle?     What drugs are used in indigestion?     What should I know about these drugs?