This article deals with the various mechanisms leading adolescents to psychological locking-up. Locking-up is different from isolation, inasmuch as it implies a disavowal of the other’s mirroring ability. Because of the conflict between narcissism and object relation and because of the way puberty upsets early dependence on infantile objects, psychological locking-up appears under the guise of a fetishistic relation. The presentation of a few clinical cases will allow us to set down some guidelines enabling adolescents to get free from locking-up, even though, most of the time, these young patients are not asking us for anything.