I always tell the story of how, before diagnosis of lupus, I had a severe pain in my jaw and my dentist said that I needed root canal. A couple of weeks after the procedure I still had the exact same pain. I was referred to a dentist in Harley Street who also couldn’t work out what was wrong, so I’d spent a lot of money on unnecessary dental work (not to mention the pain). This made me a bit wary of dentists.