It's a different kind of pain & your pain receptors are heightened by the Fibro pain. You can control impact pain & heat pain because of adrenaline Fibro pain doesn't allow the your body to release the endorphins to take the Fibro pain...unfortunately your ability to block pain will fade too. I have a very high tolerance as well but find when I have a flare up that it's intolerable

Your talking about acute pain vs chronic pain, the body processes it differently.
My main theory is that fibro pain is all consuming and relentless, it wears you down.

I think high tolerance to pain is one reason we as fibro survivors have difficulty in legitimizing our disease to the outside world. We've built up such a tolerance to pain above normal comprehension. My thoughts are that fibro attacks from inside from inside the very core of our body to out. Impact pain goes outside in. My tolerance is high on a normal level. Very high. But fibro can bring me down quick at any time with the wide spread deep pain that aches on and on. I know this doesn't help the pain but maybe helps your understanding. Of course, only my opinion.

I have given birth to 6 children, one of which got stuck during delivery, I used only gas and air for all deliveries and they were excruciatingly painful, but I can honestly say the way Fibro tortures us is a lot more unpredictable and knocks us over, pinning us down and you don't get a beautiful gift at the end of all your suffering. Hope you have felt better since posting your question xx

My husband is diabetic and is in better shape than I am. I used to workout everyday, but now just the thought of it scares me.