Excessive retrograde movement of acid-containing gastric secretions or bile and acid-containing secretions from the duodenum and stomach into the esophagus are the the most frequent gastrointestinal complaints. Also known as gastro-esophageal reflux this is a normal physiologic phenomenon experienced intermittently by most people, particularly after a meal. Gastro-esophageal reflux disease (GERD) occurs when the amount of gastric juice that refluxes into the esophagus exceeds the normal limit, causing symptoms with or without associated esophageal mucosa injury. One common cause of acid reflux disease is a stomach abnormality called a hiatal hernia. It is one of the most frequent complaints requiring special consideration during pregnancy. Some studies have shown that GERD is highly prevalent in patients who are morbidly obese. Dietary habits also have made GERD a common disease. GERD is as common in men as in women and occurs in all age groups. One of the most effective ways to treat acid reflux disease is to avoid the foods and beverages that trigger symptoms. Lifestyle changes combined with over-the-counter medications are effective in controlling the symptoms of acid reflux disease.