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Dmitry [639]
2 years ago
8

How does asthma occur?​

Medicine
1 answer:
julsineya [31]2 years ago
7 0
Asthma is caused by swelling (inflammation) of the breathing tubes that carry air in and out of the lungs. This makes the tubes highly sensitive, so they temporarily narrow. It may happen randomly or after exposure to a trigger.
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