Why would hands swall up ay night and hurt?

May not be arthritis. When hands swell at night we consider arthritis like rheumatoid - but there are many things to consider. If this is osteoarthritis you can wear isotonor gloves at night to decrease the swelling. It could be carpal tunnel - so try a wrist splints at night. Swelling could be edema but this needs to be clarified. Do the back of the hands pit, ie get an indentation when pushed.