Cigarette smoking is the most important preventable cause of morbidity and mortality. It is the single most important and modifiable factor responsible for cases of lung cancer, hypertension, and cardiovascular diseases. Malignant and premalignant oral lesions alike have been associated with cigarette smoking. Most adults and adolescents are aware that tobacco use jeopardizes their health but may not realize how great the risk is compared with other behaviors that are considered risky. This book extensively deals with the ill-effects of smoking on oral and systemic health. This book extensively covers recommended management and treatment of tobacco addiction which can be a useful resource for clinicians and academicians. An additional chapter on Passive smoking and its effect has also been included in the book.