Someone mentioned it below, but the books by Dr. Sarno might help. My buddy had chronic back pain and was able to clear it out completely with his methods.
Sarno's books and theories are a bit outdated at this point, but we now have people like Howard Schubiner and Nicole Sachs, and things like Curable.
[1] https://pubmed.ncbi.nlm.nih.gov/34586357/ [2] https://podcasts.apple.com/us/podcast/the-cure-for-chronic-p... [3] https://www.curablehealth.com