environmental allergens

Environmental allergens are substances found in the environment that can trigger allergic reactions in sensitive individuals. Common allergens include pollen from trees, grasses, and weeds; mold spores that grow in damp places; pet dander such as skin flakes from cats and dogs; dust mites that live in bedding and upholstery; and certain indoor substances like tobacco smoke or chemicals. When a person allergic to these substances encounters them, their immune system overreacts, causing symptoms like sneezing, nasal congestion, itchy eyes, or asthma. Managing exposure to these allergens can help reduce allergy symptoms and improve comfort.