If you have fatigue and you exercise (or just *do* things), how do or can you tell the difference between being out of shape "tired" (which might be okay) and PEM?
I don&
#39;t have a ME/CFS dx, but periodic fatigue as a symptom/side effect of something.
#NEISvoid
Apologies if I don&
#39;t have the terminology quite right or question isn&
#39;t clear....