This book provides updated information about the causes, triggers, treatments, and prevalence of common allergic disorders, including rhinitis, sinusitis, conjunctivitis, allergic asthma, dermatitis, eczema, hives, and anaphylaxis. It discusses the immune system and its role in the development of allergic disorders and describes such commonly encountered allergens as pollen, mold, dust mites, and animal dander. Facts about allergies to foods and food additives, insect stings, medications, and chemicals are also included, along with information about allergy diagnosis, treatments, coping strategies, and prevention efforts. The book concludes with a glossary of related terms and directories of resources, including one to help people with food allergies find allergen-free foods.