Heartburn is due to gastric acid, this can happen
in the breast bone (
the bone
in the middle both left and right of
the rib cage, also know as the esophagus. This can be like burning sensation or pain which feels like near the heart. If this occurs often you may have GERD. If you feel at somepoint when you burp or breath out, you taste and feel acid appear up your throat and mouth. That is a sign of GERD, coughing and difficulty swollowing may occur in later stages, if left untreated.