Are you feeling tired all the time? Can’t seem to rest at night and never seem to have any energy? It could be that you are suffering from chronic fatigue syndrome or an underlying medical issue. With chronic fatigue syndrome, there is no single test to confirm that you have this condition. Essentially, other medical issues must be ruled out to come to the conclusion that you have CFS. But needs to be ruled out? Below are a few examples of common CFS symptoms plus medical issues that must be ruled out in order to confirm a diagnosis.