Question

what is bronchitis....​

Answer 1

Explanation:

Bronchitis is the inflammation on lining (mucuos membrane) of bronchal tube.

Answer 2

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Bronchitis is an inflammation of the lining of bronchial tubes, which carry air to and from the lungs.

Causes of bronchitis  :-

Bronchitis is normally caused by viruses, typically those that also cause colds and flu. It can also be caused by bacterial infection and exposure to substances that irritate the lungs, such as tobacco smoke, dust, fumes, vapors, and air pollution.

The most common symptoms of bronchitis include : -

• Coughing with clear, yellow or green sputum

• Fatigue

• Wheezing

• Runny, stuffy nose occurring before chest congestion begins