I posted this on another thread and it was suggested I repost here 
So maybe your bête noire is maths. If you apply your brain and think quite hard, you can do it. You can do it for ten minutes, fifteen minutes, an hour. Someone fires fast mental arithmetic at you or requires you to solve algebraic equations. You do your very best and concentrate, and you try to make it look like you're enjoying it, but after a little while your brain is all in tangles and things start getting on top of you.
You turn up for work, and you're never sure whether someone will pop up from behind a cubey wall and you'll be required to do maths just to look normal. It might just be one or two problems or it might be a barrage lasting half an hour. The phone rings and you hesitate to pick it up because you know someone's going to make you do trigonometry. And you have to do it every day, every time you turn up for work. You can't ever snap at someone that you're not at work to do maths, you're here to do your work, because that makes you weird. Everyone likes to do a little maths now and then, what's wrong with you?
By the way, every job involves this maths barrage. You have to do it at the supermarket checkout, and when you get on the bus. Sometimes people walk up to you in the street and demand a quick quadratic equation from you. If you want to join a club where you can follow your interests, it invariably involves quite a lot of maths because nobody else seems to just be able to get on with what they're there for - they all want to have half an hour of freeform arithmetic before the activity starts and you feel left out because after an hour of your activity interspersed with frequent demands that you find x, the others all want to go for coffee and maths and you're tired out.
Maybe you latch on to one particular kind of maths you can do, or you learn to use maths in pursuit of one of your interests, but people get frustrated with you because you're always just going on about that little bit of maths that relates to your interest in knitting, because you know people like to do maths at each other and this way you feel like you almost fit in.
You might be in your thirties, and you've spent your whole life trying to pretend you can cope with all the maths, you don't know why you struggle with it so much when everyone else seems to love it, and you feel broken and defective. And you've just been told you actually have a real, neurological difference that explains why you've struggled so much.