Question Author
thanks for all the replies, girls, - the trouble with 'googling' is that there's so much info, it's sometimes hard to sort out the 'chaff'
I have the dry eyes and mouth, hence the chewing gum, and also a tendency now for nose bleeds when the weather's very dry, I've noticed that, this summer, whereas it was never a problem before.
I guess we're just connecting the dots now as I've also had trouble with my teeth and I'm going to have some tests to determine whether it's all one thing or not, so thanks again