A case of secondary diurnal enuresis (SDE) after a car accident was treated with hypnosis by means of the Hypnotic Trauma Narrative, an instrument created by the authors for use with children who have been exposed to traumatic events and develop either classic symptoms of posttraumatic stress disorder or manifest other psychosomatic symptoms. An ABAB time-series design with multiple replications was employed to measure the relationship of the hypnotic treatment to the dependent measure: episodes of diurnal incontinence. The findings indicated a statistically significant relationship between the degree of change from phase to phase and the treatment. Hypnosis with the Hypnotic Trauma Narrative was deemed efficacious as a method for the treatment of secondary diurnal enuresis. The patient was symptom-free at follow-up 6 months later.