Gastroesophageal reflux is a backward flow or reflux of stomach contents into the esophagus. Symptoms of gastroesphageal reflux disease include:
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Heartburn,
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Sour taste in the mouth,
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Pain occurring in the middle of the chest or stomach,
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Chronic cough,
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Choking sensation,
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Increased trouble breathing while asleep,
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Swallowing problems,
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Sore throat,
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Recurrent pneumonia and
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Chronic sinusitis.