What is a common complication associated with untreated GERD?

Esophagitis is a common complication associated with untreated gastroesophageal reflux disease (GERD) because the backflow of stomach acid into the esophagus can lead to inflammation of the esophageal lining. When acid reflux occurs persistently, it irritates the tissues, resulting in esophagitis, which can manifest as symptoms such as heartburn, difficulty swallowing, and chest pain. Over time, chronic inflammation can lead to more severe complications, including esophageal strictures and Barrett's esophagus, which is a precancerous condition.

While other conditions like gastritis and peptic ulcers can be related to gastric acid, they are not directly caused by the reflux of acid into the esophagus as seen in GERD. Diverticulitis pertains to the inflammation of diverticula in the colon and is unrelated to GERD. Thus, esophagitis is the most closely tied complication when GERD remains untreated.