Ask the Doctor: Question: I sometimes have acid reflux, which is horrible. What is it and how can I prevent it? Gastroesophageal Reflux Disease: Gastroesophageal reflux disease (GERD), acid reflux or reflux esophagitis  is a condition when the contents of the stomach regurgitates ( leaks) back into the esophagus and causes an burning irritation – due to some acid and the digestive enzyme pepsin – in the esophagus. Let’s step back and talk about the anatomy and physiology.  Digestion begins in the mouth with chewing and the secretion of saliva. Both break down foods in order to allow easy swallowing and help the stomach with food breakdown. Once the food…