I've been noticing lately that pain in my upper back and neck increases, sometimes gradually over the course of weeks, when I'm stressed out. Then out of nowhere I'll get a mixed episode and the pain increases 2-3x until I can calm down and get back into a stable mind. Sometimes pain goes away completely the next day, sometimes it doesn't. I'm finding that my pain is a physical indicator of my level of hypo/mania/depression.

Do the rest of you guys experience the same thing? If so, what other sorts of physical indicators do you experience?