Feeding and Eating disorders are characterized by a persistent disturbance of eating or eating-related behavior that results in the altered consumption or absorption of food and that significantly impairs physical health or psychosocial functioning. Eating disorders include pica, rumination disorder, avoidant/restrictive food intake disorder, anorexia nervosa, bulimia nervosa, and binge eating disorder. This chapter addresses the historical perspectives and epidemiology of eating disorders and describes eating disorders and the development of a greater phenomenological understanding of eating disorders through collaborative case conceptualization. It also describes biological, sociocultural, familial, and psychological factors that may potentially contribute to eating disorders along with common treatment options, including pharmacotherapy, psychoanalytical approaches, cognitive and behavioral treatments, group and family therapy, supportive therapy, and nutritional therapies. The chapter presents application of the nursing process from an interpersonal perspective, including a plan of care for a patient with an eating disorder.