Simple Braille display question

I have a very simple question concerning Braille displays. I have never used such a device, but am curious.

Do users of Braille displays get sour fingers as a result of repeated touching and stroking the Braille pins, as, as I understand it, these slid under the fingertips I the display?

How long can you keep on using the display before the fingers get sore?

Sorry if I could not find a better site where to ask this, but I really would like to know.

I guess the level of soreness, (if any?), would depend on how well the device was built.

Maybe if the pins were oriented inwards rather than outwards the touch would be more comfortable. This sends illogical to me though, someone would already have dive that.

Thank you for your responses.

I am particularly interested in what blind users would have to say here.

Thanks.