This article discusses current theories and research results related to child-parent relationships in a child with body weight. Special attention is paid to the early detection of child-parent interactions when detecting problems of overweight, eating disorders and determining a child's predisposition to eating disorders. This is of great importance for timely prevention and intervention in overweight primary school children. The result of this review is a theoretical analysis of child-parent relationships and an overview of available effective diagnostic methods for rapid assessment of child-parent relationships in overweight children.