Posture is defined as the upright well balanced position of an individual person. A postural fault is a posture that deviates from normal alignment without structural limitations. Postural faults are established in adolescence causing pain syndromes in adulthood. Major components of spinal structure and function are reviewed. The dynamics of posture are described. Characteristics and etiology of common postural faults in childhood and adolescence are characterised. Based on standardised diagnostic techniques, principles of how to manage posture and treatment of postural dysfunctions are discussed.