Chronic Fatigue Syndrome (CFS) involves prolonged periods of excruciating physical and mental exhaustion for at least six months, sometimes experiencing physical pain at the slightest activity.
Burnout is generally not turned against the self but rather against the organisation for which one works, or the clients with whom one works, or the wider socio-political or economic system.
Read more about these conditions that plague us today:
http://www.bbc.com/future/story/20160721-the-reasons-why-exhaustion-and-burnout-are-so-common
