I had someone close to me that had a tooth infection that went thru the bloodstream to the spine (diagnosis: osteomyelitis-bone necrosis). The infection rendered him completely incapacitated, unable to walk or fend at all for himself. He spent weeks in the hospital, then rehab with abx IV. The doctors were amazed he pulled thru. And at his age, he has made an amazing physical come back, though some other effects I will gloss over for now for brevity's sake.
I am led to believe that LD & co were also involved, but my main intent now is to caution hornet here, please, please get treatment help now!!
Also do read:
articles.mercola.com/sites/articles/archive/2012/02/18/dangers-of-root-canaled-teeth.aspx