Esophagitis is any swelling, redness or swelling of the esophagus, the tube that connects the mouth to the stomach. This condition occurs as a result of GERD, acid-containing fluid, caused by high consumption of alcohol, snuff, by surgery or radiation chest, as in the case of treatment of lung cancer; taking certain medicines out without much water or vomiting. For infection of the esophagus it can be produced by fungi, yeasts, such as Candida, or viruses such as herpes or cytomegalovirus. When an infection or irritation occurs, the esophagus becomes inflamed, sometimes causing an ulcer. The main symptoms are cough may include the ara difficulty swallowing, painful swallowing, heartburn or acid reflux, hoarseness or sore throat.