That seems to be strange my backpain was helped by it. You might have to check with Ask Dr.Sutter, he is a chiropractor and beliefs in flushing.
Back and neck pain might have to do with spine alignment. I see a chiropractor a few times a year since my legs are uneven and get neck and back pain when I walk for a long time.
I found this out by walking on a treadmill and it made my neck hurt, instead I switched to a stairmaster and that solved the problem.