WebMD describes indigestion as feeling over-full or experiencing discomfort during or after meal times. Heartburn in the upper stomach often accompanies these feelings. Other symptoms of indigestion include gas, belching, nausea, vomiting and an acidic taste in the mouth.
WebMD reports that indigestion itself is not a condition; rather, it is a symptom of an underlying issue, whether it is poor diet or disease. Indigestion is triggered by a host of causes that can be grouped as disease-, medication- and lifestyle-induced. WebMD lists ulcers, GERD, pancreatitis, thyroid disease, irritable bowel syndrome and stomach infections as diseases that produce indigestion as a symptom. Medications, such as aspirin, painkillers, oral contraceptives, steroids and some antibiotics, can cause indigestion, as can eating too fast, consuming too many fatty foods, drinking alcohol, smoking and stress.
WebMD states that lifestyle changes are frequently enough to keep mild cases of indigestion at bay. Avoiding acidic, fatty or spicy foods, eating smaller and more frequent meals, eating slowly and leaving plenty of time between meals and bedtime goes a long way toward avoiding the uncomfortable and sometimes painful feeling of indigestion. When indigestion is an indicator of an underlying medical condition, controlling the original condition reduces the frequency and severity of indigestion.