What is an Allergy?

Dr Mark Livezey Allergies, Blog, Dr Mark D Livezey

An allergy is an abnormal or exaggerated immune system response to a typically harmless substance. 1/5 of Americans have at least one known allergy. The substance that triggers this abnormal response is called an allergen – common allergens are pollen, mold, dust, animal dander, and specific foods. Common Symptoms of Allergies Congestion Rash Itchy/watery eyes Difficulty breathing Itchiness Allergy symptoms …