The Buddha spoke of pain and suffering and some may find what he had to say helpful. He made a distinction between the two states. He said that pain is inevitable, the body gets hurt, sick, gets old and eventually dies. Mercury toxicity brings with it its own peculiar twisted pains. Suffering though he said was something that we did or didnt do in relation to the pain. For example on person who hits his thumb with a hammer may respond angrily towards the hammer, the thumb, the pain,the world etc, Resenting maybe that it had happened, cursing themselfs for being stupid etc. So in a short space of time we have much more than just the pain in the thumb to contend with. He says that we can learn to be with our pains as they are without necessarily adding the rest. Easier said than done i know and it is something i struggle with. But i think this simple truth can be of help