Gastroesophageal Reflux Disease (GERD) is a chronic condition where stomach acid flows back into the esophagus, the tube connecting the throat to the stomach. This backflow, or reflux, can cause symptoms like heartburn, regurgitation, and difficulty swallowing. Over time, GERD can lead to complications such as esophagitis or Barrett's esophagus. Treatment for GERD often includes lifestyle changes, medications, and in some cases, surgery. Common lifestyle modifications involve avoiding certain foods, eating smaller meals, and not lying down after eating. Medications may include antacids or proton pump inhibitors, which help reduce stomach acid production.