Some doctors claim to be “prolotherapists” but they haven’t had any real training. I went to a Naturopathic doctor a few years back for treatment for my knee. The guy spent the first 30min telling me his credentials. I was thinking, dude, I’m here already, you got me. Lol. He then proceeded to give me ONE measly injection of just lidocaine for a cool $150 thank you very much! Needless to say I never went back to him.
I did find a real doctor in my town that did it (an MD who specialized in physical medicine), and it did help my left knee a lot, but he has since moved away to a bigger city. A good prolotherapist should have had real prolotherapy training from someone, and give at least 10-20 injections. More for a back injury.