GERD is the short term for Gastroesophageal Reflux Disease. This is the condition that untreated severe and frequent acid reflux contributes to, and is most commonly referred to as heartburn. As mentioned above, people suffering from GERD are not suffering from too much stomach acid, instead, they are suffering from acid in the wrong place. The most common symptoms of GERD include chest pains, chest pains and difficulty swallowing. Most GERD symptoms happen after eating.