That most likely is due to you being fixated on your thumb. We can and do consistently wire our nervous systems, and in this case you’ve probably wired yours to produce a pain sensation in your thumb.
In a nutshell, this is how chronic pain works. There most likely is nothing physically wrong with your thumb.
I have met 35+ plus people who fractured their tailbones when they were kids and it still hurts once in a while
I used to crack my thumb a lot when I was I jr high.
Now that in 40, it’s perpetually sore
That most likely is due to you being fixated on your thumb. We can and do consistently wire our nervous systems, and in this case you’ve probably wired yours to produce a pain sensation in your thumb.
In a nutshell, this is how chronic pain works. There most likely is nothing physically wrong with your thumb.