Pharmacy Corner
Heartburn: A Burning Sensation What causes heartburn?
Causes

When you swallow, the valve before the stomach relaxes to let food enter. However, when this valve relaxes at the wrong time or becomes weak, it allows stomach fluids escape. The fluid irritates the tissue in the esophagus (the tube that leads from the back on the throat to the stomach). This irritation is what causes heartburn.3,4