There are many remedies for arthritis. There are countless books written on the subject. I believe more than 15 million American suffer from one form of arthritis or another.
Most are familiar with Willow Bark for arthritis. It contains the active component, Salicin. If used as a tea, (which I utilize) it is more potent than some anesthetics for pain.
The late, great master herbalist and author of the beloved book The Green Pharmacy, James Duke (who recently passed away), believed that black cohash, poplar (a tree), and yarrow could be used to treat arthritis.
I had the pleasure of meeting Dr. Duke many times at the Herbal Conferences. We once gave him a birthday cake to celebrate his 80th. He was a real gentleman and scholar. I had him autograph my book, Medicinal Plants from the Bible.