Why does asthma get worse in cold weather?


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Atul Chhotray Profile
Atul Chhotray answered
The reason for Asthma is that the passages in the lungs constrict due to allergic reaction to an external substance, resulting in difficulty in breathing.

During cold weather things generally contract (as things expand during summers). Although the expansion/contraction is not noticeable in general but it can have significant impact. As for Asthma, if one is already having constrictions due to an allergic reaction and one breathes in cold air then these will lead to further constriction of the passageways, compounding the problem even further.

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