Question

causes of asthma?????​

Answer 1

Answer:

Asthma is caused by inflammation (swelling) of the breathing tubes that carry air in and out of the lungs. This inflammation makes the breathing tubes highly sensitive, so they temporarily become narrow. This may occur randomly, or after exposure to a trigger of Asthama is air pollutants entering in lungs, air pollution by vehicles, chimneys, factories.

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Answer 2

Answer:

1.Airborne substances, such as pollen, dust mites, mold spores, pet dander or particles of cockroach waste.

2.Respiratory infections, such as the common cold.

3.Physical activity (exercise-induced asthma)

4.Cold air.

5.Air pollutants and irritants, such as smoke.