Hi Rainier,
I also get alot of stiffness and pain in both hands lately and I've gotten it on & off over many years in my ankles and other joints. My hands hadn't bothered me for a long time, though...until recently. I can't even write much anymore because it hurts. Actually for me, typing is much easier. But since i've been diagnosed with lupus, fibromyalgia, and OA in certain parts...I am just figuring it's due to one of those. I get alot of migratory joint pains but I only seem to point out to my rheumy whatever is worst for the longest time. (I know it's stupid, but that's what I do....and it comes down to docs in the past thinking "it's all in my head", etc....) I also get alot of cramps and spasms in my hands & feet, though not sure if there is any relation.
I'm not too sure if it's my actual joints that are stiff & hurting or if it's all the connective tissues in there. But I also have some problems in my hips with some pain, snapping sounds, and muscle aches...plus my right arch has collapsed and a podiatrist thinks I might have lost some attachment of tendons in there. My podiatrist, PT, spine surgeon, and hip doc all said some of these issues could be due to lupus. So perhaps my hands may have some relation to that. It's also possible if you have family history of some of these diseases, one or more could also be affecting you.