What Causes Year-Round Allergies?
Allergens that are present through all seasons include animal dander (cats, dogs, horses and other pets, wool and feathers), cosmetics, molds, foods and house dust. House dust is a complex mixture of disintegrating cellulose (furniture stuffing), molds, dandlers (i.e. from household animals) and insect parts and small mites. Allergies that become worse in wintertime, when the hot air furnaces are turned on, are usually due to house dust.
