Very Interesting topic . Infact i am writing a manuscript on "'Alternative Pain management techniques"
I am basically reporting various non scientific and traditional approaches towards pain management in Pakistani patients having a diverse background and different diseases.
You can run a pubmed search using Pain AND Alternative Medicine AND Management etc as the key words.
I am attaching a good book for your review
Some of the Asian techniques of pain management that i know are accupressure, accupuncture, moxibustion, use of leeches, faith healings, the healing touch etc