Adolescents are all people who transition from childhood to adulthood. The age limit of adolescence ranges from 11 to 25 years of age. It is a turbulent gap accompanied by various changes in which the support of family and peers plays an important role in order for the adolescent to accept the new changes and adapt in the best way possible. This paper will deal with anorexia nervosa. More specifically, it will be explained what anorexia nervosa is, what its characteristics, goals, and treatments are. Anorexia nervosa signifies severe loss of appetite, and nervousness indicates that the reasons are emotional in nature. It is diagnosed at the age of 17, and the basic criterion by which it is diagnosed is low body weight, while the main characteristic of anorexia nervosa is the strong need to control food intake and body weight. Furthermore, the paper will discuss treatment and treatment goals. The first goal is always to achieve a weight that does not endanger the health of the patient, and the second is to eliminate the fear of gaining weight. Treatment should be multidisciplinary, together with pediatricians, gastroenterologists, psychiatrists and others ... It is very important to recognize the symptoms in time and approach the patient professionally. Eating disorders should not be taken lightly because they are a serious health problem that impairs the overall health and quality of life of the patient.