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An allergy is when your immune system reacts to a foreign substance, called an allergen. This reaction causes specific clinical symptoms. The allergen could be something you eat, inhale into your lungs, inject into your body, or touch. An allergic reaction can cause coughing, sneezing, hives, rashes, itchy eyes, a runny nose, swelling, and a…

Outdoor Air PollutionAbout Outdoor Air Pollution and AsthmaWhen inhaled, outdoor pollutants and pollen can aggravate the lungs and lead to:Chest pain;Coughing;Digestive problems;Dizziness;Fever;Lethargy;Sneezing;Shortness of breath;Throat irritation; and/orWatery eyes.Outdoor air pollution and pollen may also worsen chronic respiratory diseases, such as asthma.Actions You Can TakeGet more information about ozone maps, air quality forecasts, ozone action days, and more.Monitor the Air Quality…

About Pets and AsthmaProteins in your pet’s skin flakes, urine, feces, saliva and hair can trigger asthma. Dogs, cats, rodents (including hamsters and guinea pigs) and other warm-blooded mammals can trigger asthma in individuals with an allergy to animal dander.The most effective method to control animal allergens is to not allow animals in the home. If…

Cockroaches and PestsAbout Cockroaches, Other Pests and AsthmaDroppings or body parts of cockroaches and other pests can trigger asthma. Certain proteins are found in cockroach feces and saliva and can cause allergic reactions or trigger asthma symptoms in some individuals.Cockroaches are commonly found in crowded cities and the southern regions of the United States. Cockroach…

About Molds and AsthmaMolds create tiny spores to reproduce, just as plants produce seeds. Mold spores float through the indoor and outdoor air continually. When mold spores land on damp places indoors, they may begin growing. Molds are microscopic fungi that live on plant and animal matter. Molds can be found almost anywhere when moisture…

Dust Mites About Dust Mites and Asthma Dust mites are tiny bugs that are too small to see. Every home has dust mites. They feed on human skin flakes and are found in mattresses, pillows, carpets, upholstered furniture, bedcovers, clothes, stuffed toys, fabric, and fabric-covered items. Body parts and droppings from dust mites can trigger asthma…