Does your brain fog get worse, faster, from some mental activities than from others? Are some mental activities more difficult for you, since you got ill, than others? I've been wondering if there's any discernible pattern to any of our swirls of fog. I always had a felicitous facility with words. I was never a math or science genius, but I was proud of the progress I made in those area when I applied myself, and got pretty quick with mental calculations. Then I got sick and brain fog descended. My ability to perform mental math became sporadic, and sometimes I couldn't figure out the simplest calculation, even on paper. Was this because it wasn't my best subject? However, not only math, but my reading skills suffered. Even when reading an engaging novel I found myself having to re-read paragraphs, and still not understanding them. The words and ideas seemed to swim and drown. (However I can read aloud, or hear things read aloud, and comprehend what's said for many pages at a time.) As for trying to absorb scientific or technical information, even the most simply presented is beyond me and the strain to think actually brings on physical pain. Still, only at my very most exhausted and in pain am I unable to come up with a haiku or an acronym. Word games remain fun and easy. Is it because they're fun that they're easy? With my quickness for word play and my agonizing slowness over numbers I think I'm like a lab rat with a treat bar to push. I keep pushing the word play bar and receiving treats for my brain, and I avoid the painful zap of that other bar, the math bar that delivers a shock. Practice doesn't help: pushing the shock bar more would only make me more averse to shocks. How about you? Does thinking hurt? Do some forms of mental exertion come easier than others?