Laryngopharyngeal Reflux allergy treatment acid reflux chronic cough hives the condition called Laryngopharyngeal Acid Reflux (LPR), also known as “silent reflux”. There is some evidence it may cause chronic nasal congestion and poor weight gain. Most children with uncomplicated reflux should continue to gain weight normally, however. Laryngitis due to trauma is treated with voice rest and steroids because it is due to viral upper respiratory illness is treated symptomatically and may include mucinex, hydration, voice rest, and steroids.