I have had lower back /leg pain off and on for years (about 10) and I believed it was probably my sciatica. I put off seeing anyone because I can not do an MRI ( trauma related) and would rather suffer the pain. Seriously. It's not on the table for discussion. I am a HT survivor. 
Recently after studying more about it, I realized it sounded more like it is my piriformis. I went to a sports medicine PT who agreed, did some treatments and with some exercise he showed me for that, I have had some relief. But it's not enough. When I walk it becomes inflamed again. 
 I am going on a trip to Turkey in July and will be doing a lot of walking. I am going to loose some weight ( I am about 27-30 lbs over right now) and I know it would help but I don't want to risk this trip being ruined by pain. I would like to learn more about injections to help me be pain free (at least for this trip). Do injection work on the Piriformis? 
Thank You, Kate