I'm not 100% as he's only had the one injection and I wasn't with him.
He is very much the type who doesnt ask many questions as he doesn't want to know, that's his way of dealing with it.
He has his first appointment with the cancer treatment centre regarding radiotherapy soon so I will find out then.
Thank you for your reply though, at least I know that it may very well be a side effect and not something else. He has drawn blood on his hand also!
:)