Your esophagus is not designed to handle acidic secretions.
In gerd, the cells in the esophagus are frequently exposed to acidity and become damaged. Over time, the tissue adapts by changing its cells into ones similar to cells in the stomach. This called metaplasia
. Because these kinds of cells are abnormal in the esophagus, people with barrett's are at greater risk for esophageal cancer
Answer assisted by Brittany Chan, Medical Student