It's weird, I have arthritis in my back, neck and hands, probably the result of Lyme disease. The tub has been fantastic for my back and neck, but my finger joints are still swolen and painful. I found by accident that they feel so much better and work better in a cold soak. I was actually washing gravel for my fish tanks in the winter. The well water was in the 40's and the gravel felt like little pieces of ice, but my fingers felt great! :-/