Esophagitis causes inflammation of the esophagus. Some of the most common causes are infection, gastroesophageal reflux disease, allergies, and medications. Often, the esophagus narrows, leading to difficulty swallowing. Other symptoms include chest pain, painful swallowing, heartburn, food impaction, and acid regurgitation. If left untreated, esophagitis can lead to ulcers, bleeding, and chronic scarring.

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