Acid reflux is a common digestive complaint that occurs when the muscle at the base of the oesophagus (esophagus) relaxes at the wrong time, allowing stomach acid to flow upward. This can cause heartburn—a burning sensation that travels from the stomach into the chest or throat—and sometimes a sour or bitter taste in the mouth. Other symptoms may include bloating, discomfort after meals, or difficulty swallowing. For some, these episodes happen occasionally; for others, they are persistent and disruptive.

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