Family crisis induced by a crisis of adolescence creates a drama involving 7 characters (adolescent, two parents and four grandparents), not counting family Ancestors and Phantoms. The author underlines the positive aspects of this crisis, for the adolescent himself as well as for his close relations. This crisis, indeed, may be maturative for all concerned, if the parents know how to construct and defend a family framework and an intergeneration-boundary. The author then describes three types of family structures (derived from the parent's families origin, or created by the parents, or re-created by the adolescent) which can impede the establishment of this intergenerational boundary; preventing the crisis from occurring; preventing its development and resolution. This leads to recurrent or chronic crisis. Finally, the author indicates precautions which general practitioners should take when dealing with family or adolescent crises.