What Is An Asthma Episode (Asthma Attack)?
Asthma A chronic, reversible obstruction of the airways. Allergic asthma is caused by an allergic stimulus; most common in children and adults; caused by exposure to substances such as dust mites, plants, pollens, and molds. Nonallergic asthma is caused by exposure to substances or conditions such as cold air, exercise, or respiratory infections, rather than exposure to allergens. symptoms can vary from very mild to very severe. Some adults with asthma have only seasonal bouts of symptoms. Some have symptoms only after exercise or after exposure to something to which they are allergic, such as a dog or cat. Others have a chronic form of the disease and experience asthma symptoms almost daily.
