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9 common allergies explained

By: Laura Moss on Jan. 11, 2011, 5:47 a.m.
mold growing on wall

Photo: seishin17/Flickr

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We're all exposed to some mold on a daily basis with no negative effect; however, people with mold allergies may have a reaction if exposed to too much of the fungus. If you have a mold allergy, your immune system overreacts to mold spores, causing wheezing, a stuffy or runny nose, itchy eyes and rashes or hives. An allergy to mold can also exacerbate asthma symptoms, severely restricting breathing.

If you're allergic to mold, the best defense is to reduce your exposure to it, and certain medications can also help keep allergic reactions under control.