Indigestion is a symptom, often of GERD, ulcers, or gallbladder disease. Indigestion may make a person feel full or uncomfortable during or after eating. Other symptoms may include burping, gas, bloating, pain, an acidic taste, and more. Indigestion treatments may include lifestyle changes, medications, or in severe cases, surgery. Follow the links below to find WebMD's comprehensive coverage about how indigestion is caused, how to treat it, and much more.