Sizikova Irina Vladimirovna - clinical psychologist, member of the European Psychoanalytic Federation (EPF), psychoanalyst for adults and children, examines in her book the causes of anxiety disorder caused by separation and fear of separation; their role in the development of the child, consequences for the future. Using examples from his practice, the author shows various nuances in the formation of separation anxiety disorder, fear of separation and other anxiety disorders and examines the treatment methods associated with these features for children and adults. The proposed book is addressed to all those who live.