I have both osteoarthritis and tendonitis (thumbs) and these are the VERY best gloves that I have found.  I use them on my computer, when crocheting and sewing and any other activity that stresses my hands.  They also provide warmth which helps mobility. The weather here is already cooling and I imagine they will get even more use this fall and winter since this is an old an drafty house.

Another handy thing is that they can be worn on either hand because of the unique design for the thumb area.  So if your right hand hurts and you can't find both the 'left' can be used.

Warning:  they are not lovely or beautiful if appearance bothers you, they can be worn with the seams inside, but that is likely to cause some discomfort since they are spandex.  So, if you want gloves that will help with aches and pains these are the ones, but if they need to be attractive, look elsewhere.