Anyway, seems like you talk from your own experience regarding touchpads vs. trackballs. Thanks again for you reply, will really think about buying a trackball.
Yeah, I'm used to have ext. keyboard, so Thinkpad trackpoint is not an option. Maybe I should consider using wrist support for keyboard, too.
I also noticed that using smartphone for too long adds to the problem a lot, so I try to avoid/limit it a lot.
The more common type of trackball you see these days I find awkward and terrible for fine control with the small trackballs they have.
You can get external trackpoint keyboards, just unlikely to find ones with mechanical switches. Lenovo makes a few different USB and wireless keyboards with trackpoints.
But over the years, I have come to approach ergonomics in terms of full body.
Hand pain is a symptom of more than what my hands touch.
How my legs and feet and shoulders and back feel changes how I sit and that changes where and how my hands are positioned. If my back is aching I shift my body, my shoulders and neck compensate, and that changes my elbows, wrists, and hands.