Carpet tends to hold dust and allergens in its pile until they can be vacuumed up. With hard surface floors, when you sweep your floors, and even when a wind draft comes into your room, allergens can stir much easier into the air and into your lungs. In this instance, carpet is better for someone with allergies. On the other hand, carpet that is subject to prolonged moisture and dirt can be a breeding ground for mold and mildew, in which case carpet may increase your allergic symptoms. You can, however, choose synthetic carpets, which are mold and mildew resistant to hinder the growth of these allergens. Frequent professional steam cleaning will also help to keep your carpets clean and safe. When having old carpet removed, it is recommended that you leave the premises prior to the removal of old carpet as this can stir up a lot of dust and allergens. Also, have workers remove the used carpet to a safe place out of your home, and vacuum all areas where carpeting was removed.