op i have been dealing with this same exact shit for decades and even when i was finally given an adhd diagnosis as an adult none of this was ever mentioned as a possible symptom so its been up to me to notice the pattern myself and put 2  2 together  my guess is that with some of the more extraordinarily mundane shit that our particular brains just arent wired to handle very well for me math is a really big one even thinking about trying to force our focus on it is just such a huge drain on our internal resources that it triggers some kind of immediate sleep response  this is obviously based on nothing but my own experiences but its the most plausible explanation i can come up with for how exactly i feel during these episodes and when they start to really set in  although tbh id also certainly love it if we could pool all of our various perspectives together and see if we can work out a better and more definitive explanation for this shit—or at least put together a nice little support group community for all of us who have spent all these years thinking we were the only one with this fairly unique and specific issue kind of like rearrumblersassemble but with like people who just get super tired having to focus on unbelievably tedious shit you know what i mean  fake edit also i mean it could just as easily be some sort of separate disorder that just kinda happens to have a high rate of comorbidity with adhd but i dont think ive ever seen anything in the dsm indicating anything like that so i guess who the fuck really knows