To those Jellies who are unfortunate enough to suffer from arthritis, are there any unusual or unheard-of remedies you use for the pain?

My mother has had arthritis for thirty years it was brought on by kidney surgery she had when she was 25 and she is in constant pain. She has arthritis in all or almost all of her joints but it is worst in her left knee she got hit by a Volkswagen when she was in college, and her knee took the brunt of the damage. Do you have any odd remedies for alleviating pain in any or all of her joints?

Thank you in advance for answering. :)