I have chronic fatigue syndrome. It really limits my daily activities.  
sorry to hear that. What are the symptoms?
Mostly it's long-term fatigue that rest does not help. No one knows the cause.
Is this something that can be treated?
There are no medications or procedures approved in the United States unfortunately.  
Ohh that's unfortunate. So what can you do?
Cognitive behavioral therapy helps me a little.  
Does it affect your ability to drive a car?
I can drive. There is some new medication rintatolimod. I'd like to try.