Aha! A link between chronic fatigue syndrome and dysthymia (one of the depression family of mental illnesses; I have been diagnosed with it, along with major depression with melancholia and generalized anxiety disorder). The link was reported in this study:
I’ve been noticing huge “payback” fatigue increasingly over the last few months … better talk this over with my doc.
Truth be told, I’m experiencing that extreme type of fatigue right now, so it’s a very early night from me!