I had acupuncture a few years ago for my back issues. I have spondylolysis -a stress fracture of the L5. I decided to try acupuncture since nothing else seemed to help me. Because the needles were put in my back, I had to lie on my stomach. This was the worst position possible for me. Lying on my stomach caused compression of my sciatic nerve so instead of feeling relaxed for 45 minutes and getting benefits from the acupuncture, I was in complete agony. Even though it didn't work for me (because of the unique circumstances), I would still try it again - if I was dealing with a different issue/injury.