Laryngopharyngeal reflux disease, often known as “silent reflux” or LPR, is a disorder in which stomach acid refluxes into the back of the throat, irritating the vocal cords and lungs. LPR is a subtype of gastroesophageal reflux disease (GERD). Despite the fact that classic GERD and LPR are both caused by reflux of stomach contents, the symptoms experienced by patients are drastically different. It is much more difficult to diagnose silent reflux than classic acid reflux.
LPR is frequently referred to as silent reflux because, in many individuals, it is not accompanied by classic acid reflux symptoms such as heartburn, but some patients have both silent reflux and acid reflux symptoms. In contrast, the majority of people with LPR exhibit symptoms such as a sore throat, chronic cough, or globus sensation, which have significant overlap with other diseases like allergies, sinusitis and asthma. As a result, LPR is under diagnosed by some practitioners and over diagnosed by others.