Refluxed stomach acid that touches the lining of the esophagus can cause
heartburn. Also called acid indigestion,
heartburn is an uncomfortable, burning feeling in the midchest, behind the breastbone, or in the upper part of the abdomen—the area between the chest and the hips.
What are the symptoms of GERD?
The main symptom of GERD is frequent heartburn, though some adults with GERD do not have heartburn.