Many publications have described the comorbidity between Eating Disorders (ED) and Diabetes Mellitus (DM). However, part of the literature remains inconclusive when verifying the prevalence of comorbidity - some studies do not demonstrate a higher prevalence of eating disorders in diabetic patients when compared to the general population, while others reveal a significantly increased risk. A recent study, carried out by Jones JM, et al., involving approximately 1500 young people, demonstrated a 2.4 times greater risk for the development of ED in diabetic adolescents when compared to the control group. Herpertz S, et al, in turn, showed a significant prevalence of ED in a sample of 663 type-1 and type-2 diabetic patients. The fact is that it is not easy to make a diagnosis of eating disorders in diabetic patients, considering that the treatment of diabetes itself requires higher levels of attention to weight and dietary regimen, which determines the presence of behaviors common to patients with eating disorders. It is believed, however, that this same fact increases the risk of diabetics, both type-1 and type-2, to develop some type of eating disorder such as bulimia nervosa, anorexia nervosa or binge eating disorder. Thus, although some characteristics necessary for the diagnosis of ED are intrinsic to the treatment of DM, both conditions can overlap and constitute a mutual risk factor: The eating disorder could lead to risky eating behaviors for the development of diabetes, to whereas diabetes could predispose to the development of eating disorders. It is true, however, that, regardless of the cause-effect relationship, poor eating habits can directly interfere with glycemic control, increasing the risk of acute and chronic complications of diabetes mellitus and, consequently, significantly affecting the prognosis and quality of life of these patients, a fact in which lies the importance of identifying body dissatisfaction and eating disorders in diabetic patients, considering the former is an important risk factor for the latter, thus enabling early treatment.