I remember one particular technique called "Circle The Dragon". With this technique you literally put needle points all around the area of discomfort. Let's say for example it was knee pain; you literally circle around the knee with the acupuncture needles.
I recall Dr Oz having an Acupunturist on an episode he had about pain relief. Some medical doctor came on to say "there is no studies on it so I really don't believe in it".
That must be why it's been around for a Billion years or so, and there's acupuncture clinics everywhere??? I'm not here to promote or deny something, I'm of the philosophy: if there's no harm, try it - if it works, who cares about peer reviewed studies, etc...
By the way, I'm sure there's something out there, just do a bit more research. I'm sure you can find something out there for a billion year plus practice.