Definition of Laryngitis:

Laryngitis is swelling and irritation (inflammation) of the voice box (larynx) that is usually associated with hoarseness or loss of voice.

Causes, incidence, and risk factors:

The voice box (larynx) is located at the top of the airway to the lungs (trachea). The larynx contains the vocal cords. When the vocal cords become inflamed or infected, they swell. This can cause hoarseness, and may sometimes block the airway.

The most common form of laryngitis is an infection caused by a virus, such as cold or flu viruses. It may also be caused by:

• Allergies
• Bacterial infection
• Bronchitis
• Gastroesophageal reflux disease (GERD)
• Injury
• Irritants and chemicals
• Pneumonia

Laryngitis often occurs with an upper respiratory infection.

Several forms of laryngitis occur in children that can lead to dangerous or fatal respiratory blockage. These forms include:

• Croup
• Epiglottitis