Laryngopharyngeal reflux (LPR) is similar to another condition -- GERD -- that results from the contents of the stomach backing up (reflux). But the symptoms of LPR are often different than those that are typical of gastroesophageal reflux disease (GERD).
With laryngopharyngeal reflux, you may not have the classic symptoms of GERD, such as a burning sensation in your lower chest (heartburn). That's why it can be difficult to diagnose and why it is sometimes called silent reflux.
At either end of your esophagus is a ring of muscle (sphincter). Normally, these sphincters keep the contents of your stomach where they belong -- in your stomach. But with laryngopharyngeal reflux, the sphincters don't work right. Stomach acid backs up into the back of your throat (pharynx) or voice box (larynx), or even into the back of your nasal airway. It can cause inflammation in areas that are not protected against gastric acid exposure.
Silent reflux is common in infants because their sphincters are undeveloped, they have a shorter esophagus, and they lie down much of the time. The cause in adults is not known
Symptoms in infants and children may include:
-'Barking' or chronic cough
-Reactive airway disease (asthma)
-Noisy breathing or pauses in breathing (apnea)
-Trouble feeding, spitting up, or inhaling food
-Trouble gaining weight