The problem:

Fragrances are often added to products such as perfume, scented candles, air fresheners, and dryer sheets to create a desired scent, or even to mask other scents. A single fragranced product might contain as many as 300 different chemicals, many of which are irritants and allergy triggers. Phthalates, another group of worrisome chemicals, often appear as ingredients in fragrances as well. If the word “scent” or “fragrance” is listed on the product's label, chances are it may contain phthalates.

What you can do:

Avoid wearing perfume and using other scented personal care products. Many deodorants and personal care products that are marked “unscented” contain masking fragrances to cover up a chemical smell. These masking fragrances in turn may contain phthalates. Seek products that say “fragrance-free” on the label. Avoid artificially-scented household products such as cleaning solutions, candles, and air fresheners. Instead, use fresh flowers and plants to make your room smell nice and naturally filter the air.