Hiya, Richard, and welcome to BYC! 
If you can't get a picture right now, look up wry neck.
That's what that probably is. It's usually treatable with a whole Vit E and scrambled eggs twice a day for a couple of weeks, maybe longer depending.

If you can't get a picture right now, look up wry neck.
That's what that probably is. It's usually treatable with a whole Vit E and scrambled eggs twice a day for a couple of weeks, maybe longer depending.