My name is Chad and I have also had a temperary root canal done. A month after I have had the exact same symptons as #57687. Light headedness at first, then it hit me a couple of times to the point I thought I was going to pass out after a few seconds it would go away, the pain in my neck and back. I have had MRI, MRA, CT scans, blood tests, ear nose and throat tests, thyroid tests, over $10,000.00 in tests everything normal. The only thing I can think of is my root canal. But everyone tells me it cant be. I asked the dentist and he said it would not cause it.But after looking for answers for a year now and still having it my conclusion it the root canal. I am going to follow up on it and let you know what happens. I also do not know what it is like to feel good after having this for a year now. If you have any information that could help me I would apprecicate it.