There is a credible source where it describes how you can cure chronic pain using memory technique to the point where you no longer feel it. Chronic pain is caused by error in the brain’s nerve, now, the brain heals by rewiring itself, and not growing more tissues. Hence by ragefully going through memory palaces over and over again in your mind whenever the chronic pain comes, it will rewire the “broken” circuit that is causing the chronic pain. People have done this, this is a fact.
Here is the progress:
Average person would take a month to notice a few minutes of relief before pain comes again and you would have to go through palace again. After 4 month you should feel no pain for days.
But if you do it ragefully, you might go even faster because you work harder, the harder you work, the easier to rewire the brain. It is worth noting that “long distance” memorisation will rewire it even faster. Although the error part of the brain might not be like before (most patient remainds the same on that part), but your pain will be gone