I have Sjogren's Syndrome which includes a form of arthritis. I would wake up with searing pain in my hand and lower arm. I started wearing a brace at night and it really helped to reduce problems with my hand. I found a really good one at Wal-Mart for around $13. It can be used on either hand. It looks like it would be bulky and uncomfortable, but it really isn't. It doesn't bother my sleep at all. It has gel packs in it so the temperate of your hand stays stable which helps arthritis suffers, if your problem turns out to be arthritic.
Kay