You meant artritis? No way.
Please no medication advice, there is something called
responsibility. Advice on vitamines, minerals and natural stuff is
ok, advice on medication without knowing the diagnosis is
irresponsible and dangerous.
I would say it's something neurological if it continues even after
sparing the hand to let it rest. It would be too daring from me to
think of something like MS so I join you in the advice to consult a
specialist (neurologist), or first a GP who can suggest a
specialist if needed.