I was diagnosed with Trigger Thumb/Finger a while back, I had a cortisone shot that did not seem to do much. I bought myself a cheap wrist support and when it was very painful, I would wear it to work, just to remind myself not to use it unnecessarily.

I also try to use my left hand wherever possible but I have found it has eased up a lot.

Also occasionally it pops and this can happen even with a very gentle movement. For me, resting it helps but it is the most silly of tasks that so aggravates, like putting on my knicks!

Hope this helps.

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