The abilities to control the voiding of the bladder and to act competently in dealing with fire are important factors of the normal development of children. Unfavourable conditional constellations in the socio-emotional, cognitive, or physical realm can cause developmental defects which manifest themselves in certain target symptoms, for instance Pyromania and Enuresis. The importance of multifactorial etiological models will be illustrated by a case report of a boy displaying symptoms of Pyromania and Enuresis nocturna. The analysis of the specific conditions of the case studied results in the appropriate multidimensional treatment concept.