I have tailbone pain from a collapsed L4/L5 and near collapsed L5/S1. I have not had any injections in that area, but I did have an injection at Vanderbilt in my cervical (neck) that wound up causing me more pain than I originally had. That's not to say an injection for your issue will cause additional pain. Many people have had injections and received relief from pain. Just remember, injections are a temporary solution and you can have only so many before they cause other issues. Wishing you the best.