Anyone who's a bit squeamish. Don't read on... Last night I solved the thumb problem and today it feels great. I spoke to a doctor at school (one of the parents) who said it was probably a bit of nail ingrowing. I have experience of this with my toe nails. So when I got home I got to work getting it out. It came pretty easy - a splinter sized bit of nail. Then I gave it a good squeeze and a some yellow came out - a release for my poor throbbing thumb. It feels so much better. I should become a surgeon. It's a real bugger because it's the first time I have nice long nails after biting them all my life and I get a gammy thumb.