This book is a comprehensive, practical guide to the latest developments in the understanding and management of atopic dermatitis. Detailed information is provided on age-specific clinical symptoms, features, and diagnostic methods. Current theories on the pathogenesis of atopic dermatitis are closely examined, with attention to the roles played by genetic, allergic, immunologic, and skin barrier dysfunctions. In the second half of the book, the scientific background to and the practical use of the full range of treatment methods are described, covering topical agents, systemic agents, phototherapy, allergen-specific immunotherapy, and the most recently developed biologics and small molecules. This textbook will be an excellent guide to diagnosis and treatment for not only dermatologists but also practitioners in allergy and general medicine, including pediatricians, allergists, and primary care physicians. In addition, it will be of value for all scientists interested in developing new drugs for atopic dermatitis.