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1 Common symptoms include heartburn and painful swallowing.  If undiagnosed or untreated, esophagitis can cause problems with swallowing, ulcers, scarring of the esophagus, or Barrett's esophagus, which can be a precursor to esophageal cancer.
Over time, acid reflux may cause swelling or scarring of the esophagus that interferes with swallowing, says Dr. Chow. GERD is the most common cause of esophagitis, but other conditions can also cause esophagitis, Chow explains. Pill esophagitis. This condition may occur from swallowing pills that irritate your esophagus. Common examples include antibiotic and potassium pills, says Chow.