14 causes of wheezing—and how to treat it

Lifestyle causes
12. Smoking
The chemicals in tobacco products are lung irritants. They inflame the airways and cause a buildup of mucus, both can cause wheezing. Young children who live with smokers and breathe in secondhand smoke are particularly susceptible to breathing problems. The Asthma and Allergy Foundation of America notes that 40% of children who go to the emergency room because of asthma live with smokers.
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