The easiest "psychological technique" in this case is to simply understand the pain is likely not caused by any obvious identifiable physical cause. Just have p

The easiest "psychological technique" in this case is to simply understand the pain is likely not caused by any obvious identifiable physical cause. Just have people go through all the information. Pain usually signals something's wrong. Once you truly understand there's no basis for that pain, you will process it in a different way. Many reports of chronic pain completely going away just by reading. Psychotherapy sounds like a much less efficient way with potential to create new problems.