Most injections (my experience only. I’m not a doctor) were/are steroids. If they are repairing damaged tissue PRP. Nerve ablation is typically done by a pain doctor. They just burn up the nerves using an ablation technique. Over time the nerves do grow back. For me, the pain lasted 6 weeks and felt like a burn. Didn’t work for me but does for others. The key is having a GOOD / YOUNG pain doctor. Many communities don’t offer much choice or selection. I have been very lucky in this respect.