Most people who suffer from allergies know that trees, flowers and other plants outdoors can trigger allergy attacks, but what about indoor air quality? You may not realize it, but the air inside your home is more contaminated than the air outdoors, sometimes much more. Dust, smoke, pet dander and even excess moisture that harbors bacteria can lead to or aggravate allergies. What can you do when you’re tired of red eyes, sneezing and a runny nose?