I don't think the shocks should have been felt with the epidural. The disogram is not such a good injection. It is more of a test I think. Ask more of the site on this one, and look up the proceedure on google. I would also ask your doc. if it is absolutely necessary. I run for the hills at this kind of stuff. I also had infusions, that didn't hurt. Those tests that cause pain, I am a wimp over. Others do just fine. I am a wuss sometimes....ginnie