This book aims to become a useful tool in the field of bariatric surgery providing the most up-to-date research in the field, including the recent data on surgical techniques, the current strategies for diagnosis, treatment, and follow-up, as well as extensive discussion of the possible complications. More specifically, the following issues are discussed in the chapters of the book: morbid obesity, surgical techniques, bariatric brachioplasty, sleeve gastrectomy, metabolic improvement following bariatric surgery, diabetes mellitus and bariatric surgery, weight loss after bariatric surgery, sleep apnea, diet after bariatric surgery, complications and infections, pregnancy and bariatric surgery, pelvic floor disorders, bariatric surgery in adolescence, oral health after bariatric surgery, and the psychological aspects before and after bariatric surgery. Treatment options as well as possible complications are also discussed. Finally, the authors suggest fields for possible future research.