Your hand condition could be a precursor to arthritis and/or gout.
Had the condition checked out by a specialist with blood test, cure it by medication and diet, you'll be much better off in the near future.
I had issue in my shoulders and hands when I was 53-55, my golf game went to the toilet and I could not understand why. All the abuse to my body from my youth activity like track and field , weight lifting and martial arts had come back with vengeance . My M.D. put me on medication to relieve some of the pain and discomfort and through diet over the years I'm much better than a decade ago.
Not only my golf game improved from then but also quality of life is much better.