The case of a girl of twenty-three, suffering since the age of sixteen from pollakiuria, is reported. The symptom was preceded by a long period of hysterical vomiting which occurred after a fellatio fantasy in childhood. The accompanying 'urinary envy, competition and ambition' were found to have developed as a reaction to an oral regression which resulted from traumatic experiences. The pollakiuria had the significance of an unconscious, aggressive defense against sexual wishes. It occurred when adolescent sexuality became a source of conflict and was determined by a history of extreme urinary rivalry secondary to oral regression. Competitive feelings towards men as well as towards women, but also the wish to give in a positive sense, found unconscious expression in the pollakiuria which permitted as well gratification of exhibitionistic tendencies, although in a masochistic way.