asthma cause asthma cause asthma cause asthma cause asthma cause asthma cause asthma cause asthma cause asthma cause asthma cause asthma cause asthma cause Asthma Glossary of Terms Allergen: a substance (such as a food or pollen) that your body perceives as dangerous and can cause an allergic reaction. Allergy: an exaggerated response to a substance or condition produced by the release of histamine or histamine-like […]