There is a symptom which I think has arrived only recently, which means during the last few years. I might have had it before, then the symptom declined, and I forgot about it. I don't even know what to call it. Brain fever? Warm brain? If I concentrate too much, it actually feels as if the brain's temperature rises. I don't feel feverish otherwise, not on the forehead, but just at the top of the brain. I can have an otherwise pretty ok day (however there might be a correlation with increased twitching). Not spending too much time in front of a screen and only doing light cognitive things, if any, for a while helps. It is not painful, but it increases brain fog a lot. I had a headache from hell long time ago for a couple of years, and this is nothing like that, just a bit uncomfortable. Is this symptom further described somewhere? I don't know how to explain it to my doctor (who is sympathetic, but not that familiar with ME). I kind of wish I could put a cool, damp cloth directly on top of my brain.. Does anyone of you have this? Any thoughts you'd like to share? Edit to add: I have for many years often felt slightly feverish, although the body temperature was actually a bit lower than normal. This might have concealed the symptom I write about if I had it at that time as well.