Do you have low back pain? Do your joints ache? Do you experience the persistent pins and needles feeling of neuropathy? Or maybe you have fibromyalgia and hurt all over? If you do, you're one of the 39 million Americans who suffer from persistent pain. Being on the pain train is bad enough without the added insult of being told that it's 'all in your head'. But what if it is -- at least partly? There are some types of pain that are obviously linked to an actual physical insult and other...