<unk>  may be classified according to the etiology, and disease duration into infectious and noninfectious causes. Infectious<unk>  may be subclassified into bacterial, viral and fungal causes.
Noninfectious<unk>  is main due to trauma from foreign objects inhalation and chemical burns On the basis of disease duration,<unk>  is almost always acute in presentation requiring emergency treatment else the outcome is fatal.
Epiglottitis classification
Adenoiditis classification
Rhinosinusitis classification
Laryngitis classification
Rhinitis classification
Pharyngitis classification
Tonsillitis classification
Laryngeal cancer classification