In reply to purple sue:
Glucosamine and chondrotin never worked for me for OA.
I have a mixture of things including ibuprofen gel 10% on prescription, but also paracetamol and codiene as well depending on level of pain. I also use, and much prefer, Deep Freeze and Biofreeze gels which work well for me.
However, I don’t like to use prescription painkiller drugs if I can avoid and generally only use the ibuprofen gel for other larger joints affected by OA and even then rarely. (I’m hesitant as I can’t have ibuprofen orally and I’ve had opposing opinions from professionals as to whether the gel works in the same way as tablets and has the same side effect risks!)
Specifically, for finger OA, and fortunately for me an excellent non drug treatment (and far better than painkillers in being quicker, more effective and longer lasting), I’ve used is cold water immersion. As cold water as you can get out of tap and add ice in a basin, plunge hands in and wait. The idea is to get the fingers really cold and then allow the body to reheat them which happens with a rush of warm blood; the cold reduces the inflammation and it’s the blood pumping back in that encourages healing. Repeat if necessary, but I find once now is enough that I have got used to it!
Of course, this is certainly not a treatment for everyone, but works very well for me. Aching, stiff, swollen joints after some climbing sessions quickly relieved without need for painkillers. If only I could do other joints that way!
Massaging the finger joints to stimulate blood flow into the fingers with thumb and forefinger of other hand though is surprisingly effectively for temp relief of low to moderate level of pain/stiffness and can be done between climbs easily if needed.
I’ve heard some swear by magnesium gel and I am about to try it as an experiment for shoulder OA.
HTH. Usual disclaimer though - at your own risk and seek medical opinion.