For many, the rich food, abundant alcohol, weight gain and stress of the holidays likely lead to one thing: heartburn. But new research finds that an increasing number of people struggle with the burning and pressure of surging stomach acid all year long. A new study reports that the number of people who frequently experience symptoms of heartburn, also called acid reflux, has almost doubled in the past decade. Acid reflux can mean more than just discomfort -- too much surging stomach acid can create a web of scars in the esophagus, causing food to get stuck on its way down. Research also has connected acid reflux with an increased risk of esophageal cancer, particularly if it is chronic and untreated.