I was finally diagnosed with fibromyalgia, for certain, after spending so many years of not understanding my pain. I requested a doctor with knowledge in the area of fibro, and she ruled out any other possible problems I could have before diagnosing me and prescribing me cymbalta. I felt a difference in the pain after 5 days. Usually I can never wear high waisted shorts for very long, or I experience burning pain from the limited movement, but I was able to wear a pair for an entire day. The dull pain and heaviness are still there, and the burning comes back at times, but for the most part, the shootings pains and spasms I felt have subsided. The fire I felt is more like a flame now. I'm still taking an antidepressant I was previously taking that had stopped working, and the cymbalta has helped to improve my mental state as well. This is just a TOTAL gift to me, to be able to continue working and living and functioning like I need to. Just wanted to share for anyone else experiencing mysterious muscle pain, or pain of any kind. It's so wonderful when you finally find your solution, even if it's only an improvement. Don't give up.