I deal with chronic daily pain. Something I've noticed, it's worse and I'm less able to tolerate it when depressed. In stable mode, it sucks, but I have things to help. During mania, I still have the pain but don't feel it as intensely. I can do upside push-ups while manic and can't even do a regular push up when depressed. So I guess my tolerance fluctuates with my mood. My doc said my pain goes down during mania because of the extra adrenaline coursing through my manic veins. I wish I could stay in a controlled mania, just for the pain relief.