Allergic diseases are a pathology that almost every doctor encounters in their work, which confirms the particular relevance of solving this problem at the present time. The reference manual systematizes modern ideas about allergic diseases and diseases acquired in connection with occupational hazards, while special attention is paid to new treatment methods and issues of organizing qualified allergy care for patients. The manual is intended for allergists, as well as therapists, pulmonologists, occupational pathologists, and gastroenterologists.