The prevalence of obesity has been growing on a global scale and almost all health caregivers has been involved in its treatment and management. Bariatric surgery has emerged as an effective approach for weight reduction and associated with improved general health. Preoperative psychiatric assessment for bariatric candidates is necessary since the importance is well established. Also empirical data suggest that a high prevalence of psychiatric comorbidities among bariatric surgery candidates. Research indicates a decrease in certain psychiatric symptoms after weight loss with bariatric surgery. However, the risk of unsuccessful weight loss and suicide in some bariatric surgery patients make monitoring after surgery as important as the careful assessment and management before surgery. Neverthless, this area needs a standard protocol to guide the mental health professionals that deal with bariatric patients. In this review, we focus on the management of bariatric surgery patients both preoperatively psychiatric assessment and postoperatively psychiatric  follow up.