Is there a good alternative treatment for whole-body pain?

It depends... What is the cause and suspected diagnosis for the pain? It it is fibromyalgia or chronic widespread pain, which are not clearly understood, so treatment is directed at relieving symptoms, mood, pain and function rather than attacking the causes; but studies have shown that succesful treatment of pain generators such as an arthritic joint or muscle trigger points, can diminish the pain.
Yes. There are several alternative therapies for pain management ranging from acupuncture, physical therapy, chiropractic medicine, relaxation therapy, meditation, exercise, and cognitive behavioral therapy. Best place to start would be a consult with a pain management center.