I posted a few days ago about a maxillofacial referral. I had lots of poking and prodding today, as well as detailed x-ray of my jaw, and it turns out my symptoms are consistent with precisely nothing. 
But the pain keeps getting worse.
The next step is for an MRI scan on my head. The doctor really didn't want to be drawn on what they would be looking for with this (he just presented it as the next step available to them in diagnosing the problem), so I just wondered if anyone could shed any light on what they might be looking for? I'm too scared to google.
I'll apparently need a dye injection and will be in the machine for around an hour.