How long does it take for heartburn to go away?

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Heartburn, sometimes called acid indigestion, is a painful, burning feeling in the middle of your chest or the upper part of your stomach. The pain, which can also spread to your neck, jaw, or arms, can last just a few minutes or stick with you for hours. There’s a muscle at the entrance of your stomach, called the lower esophageal sphincter (LES), that acts like a gate: It opens to let food move from your esophagus to your stomach, and it shuts to stop food and acid from coming back out.

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