Body dissatisfaction is a risk factor for development of eating disorders and represents a core psychopathologic feature of eating disorders. Prevention and treatment interventions address established risk and maintaining factors for body dissatisfaction: appearance pressures, internalization of appearance ideals, upward appearance comparison, avoidance and checking, and body disparagement. It is essential to address body dissatisfaction within eating disorders treatment to improve outcomes and reduce risk of relapse. Future directions in research and treatment aim to reach populations increasingly recognized as in need, including children, men, and individuals at higher weights, with the ultimate goal of reducing the significant distress associated with body dissatisfaction.