I went to an acupuncturist to see if he could help me with phantom limb sensations in my foot. My leg was amputated above the knee years ago, and I have pins and needles sensations in the toes of my long gone leg.
He put needles into my remaining foot, which I thought was odd. I thought he would be blocking nerves in my back or something.
The therapy didn't work for me, but I did learn something that has helped me. I can massage the toes of my remaining foot to relieve the sensations in my phantom foot. I don't know why I never thought of that prior to seeing the acupuncturist.
As far as the validity of the treatment, my own personal belief is that our culture has more to do with our health and the efficacy of treatments than we realize. Many Asian people see acupuncture as a perfectly valid and reasonable treatment, while some Westerners, like me, are more skeptical. Does that affect the outcome? I think it does. And I don't mean to imply that it's simply the placebo effect. I just think a person's state of mind and cultural identity may actually affect the outcome of a specific treatment such as acupuncture.
So that's my two cents, for what it's worth.