This book provides updated information about a wide variety of allergic reactions, including common symptoms, diagnostic tools, and prevention strategies. It recounts what is currently known about the causes of allergies and the role the immune system plays in their development. It presents facts about rhinitis, sinusitis, dermatitis, urticaria (hives), anaphylaxis, and other types of symptoms produced by encounters with allergens. It also looks at the substances responsible for triggering these types of symptoms, including specific foods, animals, pollens, and chemicals. A special section on managing allergies in daily life outlines ways to avoid allergy triggers, handle medication at school, and cope with other challenges. The book concludes with resource directories for learning more about allergies and finding recipes to aid in the management of food allergies.