Gordon, I urge you NOT to work through the pain.
I generally don't now, but when I had a day job there were times when I had little choice if I were to get the work done. Some tools offer no option than using a mouse. Trying to avoid the pain with those tools was why I became pretty ambidextrous with mouse, vertical mouse, trackball and thumb-trackball and why I often wore a wrist brace. Fortunately I can now just avoid most of those. If it starts to hurt now, normally I curse and stop.
I agree 100% with your statement.
If a mouse is causing pain, do
not work through it ... it will likely cause long term damage,