This book has 16 dedicated chapters on allergy epidemiology, immunology, aerobiology, systemic allergies, modalities in allergy testing, and immunotherapy. Each chapter carries explanatory diagrams and tables with recent updated international guidelines to help understand allergic disorders better. Also, at the end of every chapter, several article titles have been suggested for further reading and learning. The highlights of this book are the consolidated algorithms at the end. These have been prepared with an aim to provide practical approach in managing an allergic child in the office. This book also discusses common myths regarding allergies in the general population. This book will be beneficial for general practitioners, pediatricians, allergologists, and residents to better manage their patients.