The most common causes of Laryngitis is a viral infection, from colds or the flu.
Infection can be:
- Viral: Rhinovirus, influenza virus, parainfluenza virus, adenovirus, coxsackie, coronavirus.
- Bacterial: group A streptococcus, streptococcus pneumonia, C. diphtheria, M. catarrhalis, H. influenzae, bordetella, pertussis.
- Fungal: Histoplasma, Blastomyces, Cryptococcus, Coccidioides, Candidiasis in immunocompromised individuals
- Over Use/Misuse of Voice: Laryngitis from over use of voice can be sudden in onset or an ongoing problem. This is another significant factor in causes of laryngitis.
Chronic hoarseness can occur in many different ways that are unrelated to laryngitis.
Not all hoarseness occurs as a result of an infection or laryngitis. This can also vary from the serious to those not so serious.
Other potential causes of laryngitis of chronic type:
- Acid reflux – GERD (Gastro Esophageal Reflux Disease)
- Chronic Sinusitis
- Excessive Coughing
- Excessive smoking or consumption of alcohol
- Overuse or Misuse of the voice like excess talking, singing or shouting, talking too loudly.
- Prolonged use of Corticosteroid Therapy
- Thermal or chemical burns
- Laryngeal trauma-endotracheal intubation
- Irritation due to allergens ,chemical inhalation, and exposure to chemicals , toxic fumes
- Vocal cord paralysis
- Obstruction: Abnormal growths – polyps , tumors
These are important causes of laryngitis.