This book is intended as a manual and offers an essential tool for practicing and occupational dermatologists, for postgraduates training in dermatology and allergo-immunology, and for allergologists and occupational physicians. Moreover, the authors include information from the world literature, addressing the needs of those who work in industrial fields and are concerned about the dermatological safety of products. The book provides a handy update on this complex, rapidly evolving research area, and in particular, an in-depth analysis of its clinical aspects. It will enable dermatologists to recognize the various clinical manifestations of the condition, make a prompt diagnosis and choose the most effective treatment.