a common and self-limited inflammatory condition lasting less than three weeks,
usually associated with either an upper respiratory tract infection or acute vocal strain
Viral (most)
Moraxella catarrhalis
Haemophilus influenzae
Streptococcus pneumoniae
Laryngitis
Tracheal injury, laryngeal airway trauma, Strangulation
Pharyngitis
Posterior sternoclavicular dislocation
Sinusitis
Iatrogenic injury to recurrent laryngeal nerve: vagal nerve stimulator complication, ENT, thyroid, or thoracic surgery
Croup
Foreign body aspiration