Common causes and how they produce a burning sensation
Several mechanisms can cause a burning throat. Acid reflux (gastroesophageal or laryngopharyngeal reflux) can bring acidic stomach contents up into the throat. Viral or bacterial upper respiratory infections often inflame throat tissues. Allergic reactions and post-nasal drip can irritate the pharynx, while dry air, mouth breathing or smoking cause mucosal dryness and irritation. Certain foods (spicy or acidic), chemical irritants and some medications may also provoke a burning feeling.

