What are the 4 silent signs of a heart attack?

Acid reflux is when stomach acid gets pushed up into the esophagus, which is the tube that carries food and drink from the mouth to the stomach. Some reflux is totally normal and harmless, usually causing no symptoms. But when it happens too often, it burns the inside of the esophagus. An estimated 14–20% of all adults in the US have reflux in some form or another.

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