Since 2002, an MS Registry has been implemented by the German MS Society in more than 100 German MS centres. The objective is to provide information about disease characteristics, and to monitor the health care situation in a large population of patients. The aim of this report is to give detailed results on MS symptoms. By October 2008, data sets from 16,554 patients were recorded by 86 centres. A strikingly high number of persons suffered from fatigue and other "invisible" symptoms during early and late stages of the disease, underscoring the negative impact of these symptoms on quality of life in MS patients.