Bronchitis (infection of the large airways or bronchi)

Bronchitis

Sinus infection Infection of the pharynx Infection of the large airways Middle ear infection Infection of the tonsils Infection of the voice box Infection of the small airways Lung infection

Click on the name of the infection in the image above to find out more about the symptoms, diagnosis and treatment of these respiratory tract infections.

What is bronchitis?

Bronchitis is a chest infection affecting the large airways that carry air into your lungs when you breathe. These airways (bronchi) are part of the lower respiratory tract. Bronchitis is usually caused by a virus and often develops after a sore throat (pharyngitis), a cold, or 'flu' (influenza).

The lining of the bronchi normally produces mucus to trap dust and other particles in the air we breathe, to prevent particles going into the lungs and causing irritation. During an infection, this lining becomes irritated and swollen (inflamed) and produce more mucus than usual. Your body tries to get rid of the mucus by coughing.

Bronchitis is common in both adults and children.

Read more about the causes, symptoms, diagnosis and treatment of bronchitis.

Latest information - acute bronchitis

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