Except that it is all in our heads, ultimately. Pain is a sensation in our brains, based on inputs from everything else. That "everything else" is often our physical nerves, but can also be everything else going on in our heads. If someone needs to meld the idea of psych-driven pain with physical pain, trying to deny that they come together in our heads can backfire. It is more important to focus on what we even mean by pain being "real", and that it being in our heads does not invalidate it in the slightest. It is real, and there are more paths to recovery to explore.