The most physical pain I have ever been through was when I was combing my hair and managed to pinch a nerve and tear a muscle in my neck at the same time. NOTHING I did would make the pain stop, and NOTHING I did didn't hurt. I couldn't get my clothes on, I couldn't lay down, I couldn't do anything. Or it would hurt.
I just got over this, actually. It doesn't hurt too bad now, but I should get checked out for a hemorrhaged spinal disk soon.