Acid reflux is basically the same thing as GERD (gastroesophageal reflux disease). Symptoms of acid reflux include heartburn, regurgitation, burping, nausea, bloating, and abdominal pain. Most people experience these symptoms after a big meal or when lying down. It's also common during pregnancy. Treatments include antacids, avoiding food triggers, quitting smoking, eating smaller meals, and more. Follow the links below to find WebMD's comprehensive coverage about what acid reflux is as well as causes, symptoms, treatments, and prevention.