Here's an article attempting to discuss Western reasoning of how acupuncture works in the body. The author brings up the need to unify the different Western theories of how acupuncture works. A researcher quoted in the articles states that acupuncture and Chinese medicine is a "retrospective science, going on for 3,000 years. We know it works, we just don't know why. It's very hard to translate into Western language." (my emphasis)
I would suggest that while it is important to discover why acupuncture and other techniques used in Eastern medicine modalities work in a Western sense, it is equally, if not more important, to maintain knowledge of its history and context. Without this, the system of treatment loses its meaning, value and effectiveness. Without the knowledge of where acupuncture comes from and how it is traditionally used, the danger can be that it will be used in an isolated manner, instead of as a treatment affecting the whole body/individual. The fact that there are many ways that acupuncture has been found to affect the body attests to this idea already. Western thought and language may not have a concept of a whole body effect such as this, so a new vocabulary may need to be developed.
A personal idea of mine is that Western science still does not have a technique or the computing power yet available to assess or measure what the ancient Chinese were able to observe and incorporate into an entire system because of their wholistic/taoist(Yin/Yang) worldview. I do think that given more time and technological advances, the Chinese medicine approach to health maintenance and treatment will be explainable in a Western reductionist manner. A new vocabulary and mindshift will need to develop; as with Einstein's theory of relativity, the world's perception of reality will change when this occurs. We as a society are realizing more and more how interconnected all life is (as the indigenous peoples warned our forebears), we must simply (or "complicatedly") apply this to how the body's physiology works.
Here's the link to the original article:
A Healthy Poke: Demystifying the Science Behind Acupuncture
http://www.theatlantic.com/life/archive/2011/09/a-healthy-poke-demystifying-the-science-behind-acupuncture/245816/