Gastroesophageal reflux disease, or gerd, is a condition in which stomach acid backs up in a person's esophagus these can include heartburn, reflux of the stomach contents into the throat, nausea, vomiting, and thick phlegm in the throat. Acid reflux coughing up phlegm. Acid reflux coughing up phlegm gastroesophageal reflux metallic taste in mouth can gastroesophageal reflux cause esophageal thickening acid reflux and coughing up mucus cats coughing up blood coughing spitting up blood connect by text or video with a us board-certified doctor now — wait time is less than 1 minute!.
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Acid reflux occurs when acidic stomach contents leak up into the esophagus, and it is most commonly associated with symptoms like heartburn if stomach acid irritates the throat or goes into the lungs, it can cause problems like excessive mucus production and wheezing.