Who has "hand" advice? I often have sore hands due to a combination of running a chainsaw, coding and moving thorny brush. #asknostr
Discussion
Smothering them in castor oil is what comes up intuitively right now for you. Maybe get some organic cotton gloves and sleep with castor oil hand mask overnight.
Do you eat carbs? If so, also reduce that.
Depending on laws where you are, you might be able to get some CBD infused lotions or ointments. I've heard they can provide pretty decent pain relief. I haven't heard about them being used specifically for hands, though. And that doesn't help fix the problem, just reduce the pain, so I'd look into how to help prevent the problem, too.