This is really the next frontier of medicine, thanks for sharing! This is the missing link between mind and body that's lacking in modern medicine.
I've heard the phenomenon called "Neuroplastic Pain" and this general technique for solving it as "Pain Reprocessing Therapy". The pain is real but it's signal processing problem, not a mechanical injury! It changes the way we approach chronic pain. "The Way Out" by Alan Gordon is my go to book for this.