Background: Result from an earlier study I carried out in the late 1990 showed that cancer patients were overall well informed about diagnoses, prognoses, symptoms, treatment, side-effects of treatment e.g. pain, nausea and vomiting and hair loss. Their knowledge about fatigue as a side -effect to cancer and cancer treatment was however different. Patients had minimal knowledge about fatigue and they were not prepared for this side-effect and as a result of this they did not know how to handle fatigue and fatigue was seen as a very frightening experience.