Jim, I have had this problem. I also had terrible on/off kidney pain. My chirpractor suggested that it was systemic yeast. I thought he was crazy. But when the problem got out of hand, and I couldn't take it any more, I went off sugar. The problem disappeared, only to come back if I ate sugar (molasses, honey, lots of fruit etc). As we have read on this forum, mercury causes yeast problems. I am glad to say that since having my fillings replaced, though I still am very careful about sugar, if I eat some sugar now and then, my symptoms do not come back. <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />