Don't fret, we seem to be cross-posting, Jules, my head is on sideways and I feel I'm being very curt and not explaining anything at all well. I use ME. According to WHO listings it is G.93.3. Benign Myalgic Encephalomyelitis. A Neurological and Immunological illness. It's the one where PEM is a major problem. That's what I've got. I do not have a diagnosis of anything though. My gp and his entire surgery are simply not interested. I've been treated with nothing but contempt (and a couple of inappropriate antidepressants) and left to rot. I'd be happy to call it WIG (I've even suggested this before) "Whatever I've Got", but I won't use CFS. I don't (personally) recognise "CFS" as anything but a derogatory label, that is, as far as the uk is concerned. It gets even more confusing with different countries using this label, but meaning different things there.