Paediatric psychology is a specialty that deals with the diagnosis, study and treatment of problems of physical, motor, cognitive, perceptual, emotional and social development of children of all ages through to adolescence. Some of the most common psychological disorders in the consultations are related to fears and language disorders, sleep, activity or food. The paediatric psychologist analyses by segment observing their behavior and conversation to make a diagnosis of possible problems or disorders and offer the most appropriate therapy for each case. In addition, all variables of child development are discussed, including both social and environmental influences such as genetic factors. Normally, the psychotherapeutic work also involves the cooperation of parents and teachers, as well as continuing its guidance for positive child development.