Zegerid capsule , white , oblong oblong Blue ink1 blue band heartburn is a painful, burning sensation in the lower chest, caused by ?acid reflux.? Acid from the stomach moves back (or ?refluxes?) into the esophagus, often causing heartburn pain. What is frequent heartburn? Heartburn that occurs two or more days a week. What are some foods associated with heartburn? Acidic fruits such as oranges, lemons, grapefruits, and tomatoes fried and oily foods onions, peppers and highly spicy foods fatty meats chocolate, alcohol, coffee and mint. What factors can increase my risk of experiencing heartburn? There are multiple factors including but not limited to stress, smoking, getting older, obesity, and lying down after eating.