Obesity can be defined as the excessive accumulation of body fat that causes damage to the health of individuals, and in Brazil it has become a public health problem. As it is a multifactorial disease, there are several forms of intervention, such as nutritional, use of anti-obesity drugs and physical exercise, however, as some individuals do not respond to these therapies, the search for bariatric surgery has been increasing. The countries that most perform this type of surgery are the United States and Brazil, respectively. There are different types of bariatric surgery techniques, which can be performed by laparotomy (open surgery) or laparoscopy (more invasive technique), the most used are the intragastric balloon, adjustable gastric banding and gastric bypass with Y- de-Roux shunt. However, some emotional problems have been identified in patients undergoing bariatric surgery, such as depression, emergence of eating disorders, alcohol abuse and even suicide.