My daughter got me the neatest wrap for Christmas for my thumb and carpel tunnel/trigger thumb related to my decorative painting, mixed media work as well as knitting, crocheting and computer texting, etc. I have had several shots so it is doing pretty good, but I have used the wrap 3 times since receiving it.
The item can be either hot or cold. I put the wrap into a baggie and then into the freezer with my ice cubes for cold therapy. For hot: I put it into my microwave on a little rubber mat that I have and wore it to bed to help relax the tendon. Very relaxing. You can purchase unscented or lavender.
I have no affiliation with this vendor....just thought I would share the site with other artists who might have a need for easing aches/pains that come from our art, repetitive motion, etc.
Texting Thumb Wrap is the item my daughter purchased for me.