Laryngitis is an inflammation of your voice box (larynx) Causes Viral infections. Bacterial invasion takes place with Streptococcus pneumoniae, Haemophilus influenzae, Hemolytic streptococci and Staphylococcus aureus. Exanthemata fevers, such as measles, mumps, and chickenpox. Chronic sinusitis Excessive alcohol use Habitual overuse of your voice (such as in singers or cheerleaders, by speaking too much, speaking