What is a nerve root stimulator exactly? Is it inserted into the neural space or does it require surgery? I have tried just about everything for DDD with nerve involvement, but have never heard of the stimulator.

1st of all welcome to ehealth! If you are talking about the surgical type, they generally do a trial on you. They do help some but not all. If you are talking about something like a Tens unit, they might help for a while and they are also known to help some but not others. Good luck! keep us posted.