Top Allergy and Asthma Triggers -- and How to Avoid Them

by Stephanie Welch Alexander

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Dust Mites
These microscopic, sightless, eight-legged arthropods are natural inhabitants of indoor environments. Dust mite droppings are the most common trigger of allergy and asthma symptoms.

Dust mites are found throughout the household and thrive in high humidity and where human dander is located - such as mattresses, pillows, bed linens, upholstery and carpeting.