If you or someone you know suffers from chronic fatigue that never seems to go away and is interfering with the quality of their life, it’s probably CFS (chronic fatigue syndrome). Aptly named, CFS is a chronic condition that is characterized by fatigue or exhaustion. Often there is no known cause. This can be very frustrating for the sufferer and those who live with someone who is suffering in this way. It’s so much worse than just being tired and unfortunately, people who don’t have it often don’t understand it.