About a month and a half ago I was working a project that involved a serious left-handed pinch using just the pointer and thumb. The next day I noticed that my thumb clicked whenever I extended it. It still does. No pain when pinching, but a weird feeling when I do barre chords on the guitar, and still the clicking on extension.
mattleaf | Rockandice.com Forum
The lesser-known variety of trigger finger, trigger thumb will garner no more sympathy than a runny nose and will attract such comment as, Yer, my mum had that when she did Realization.
I agree. Shut up and climb. Like knee-bars, thumbs are cheating.
As with trigger finger there will be a thickening in the flexor tendon. This catches at the aperture of the surrounding sheath and causes the trigger sensation.
In all likelihood it will correct itself, usually within a couple of months. Have a read of Ask Dr. J issue 175 at www.drjuliansaunders.com for a little more info. If the clicking is more irritating than disabling, I would try to ignore it while engaging some of the allied therapies such as acupuncture. Cortisone can be helpful and complications are unlikely, though if you do get them they can be far more problematic than the condition.