Hi Jean,
Sorry to hear you're having some weird numbness going on. Before I was diagnosed I woke up one day and the right hand side of my body was numb along with the right side of my face/head. I could still use everything, but it was slightly weaker - ever so slightly - like if I was holding a cup I almost had that feeling like when you're quite drunk and a cup could almost slip out of your hand if that makes sense? Anyway, like an idiot, I waited a couple of days before I went to see a doctor, they had no idea what it was. The body numbness went away after a week (and never came back) and the facial numbness remained until I woke up from surgery (I was diagnosed several months after this numbness and had surgery about 5 months after I was diagnosed). One of my neurosurgeons thought that because there was a fairly substantial cyst inside my tumour, that the cyst had grown really quickly and with this growth the facial nerve was stretched (causing the facial numbness) and the tumour had impacted on the brain stem all of a sudden causing the body numbness. He thought the brain stem had then got used to being impacted and the feeling came back in my body, but the nerve was still stretched in the face - or it was something like that anyway. So I gathered from that that my numbness was caused by my tumour. So yours may or may not be, but I wouldn't have thought that it's all in your head (so to speak). Might be steroid related? I didn't get any further numbness when they put me on steroids but maybe someone else here has?? If you're having radiation I'm guessing that your AN isn't massive, so it might be something else entirely - but I'd definitely follow it up if I were you with some kind of doctor as, unless you sleep on your arm funny or something like that, numbness isn't something that is all that normal.
Cheers
JB x