The sedentary lifestyle, common to most modern societies, has turned obesity into an increasingly prevalent and universal problem. Obesity correlates positively with many diseases and health risk factors. Medical therapies currently used to treat obesity are generally limited in terms of long-term effectiveness. Bariatric surgery has been demonstrated an effective treatment for morbid obesity. Special nursing care considerations for bariatric surgery include providing wider cuffs for blood pressure checks, preventing deep venous thrombosis and post operation dietary education in order to accommodate changes in the gastrointestinal system. The purposes of this article were to introduce obesity therapy trends as well as to share nursing care principles for those undergoing bariatric surgery.