Is the blemish treatment effective even on pigmentation that looks like small dots?

I have a few very small brown spots on my cheeks and around my nose, so I am considering treatment for the blemishes.

It is too light to be a mole, and each one is too small to be a blemish, so I don't know exactly what kind it is.

It seems like the number is gradually increasing over time, so I am wondering if it would be better to manage them before more appear. Would blemish treatment be effective even on these small pigmented spots?

I am wondering if there are cases where it is better to start treating blemishes when they are light, rather than waiting until the pigmentation becomes darker.

I would like to know if it is possible to selectively treat only small areas for blemishes, or if it is more common to manage the entire face together. Since this is my first time, I would like to receive treatment only on the necessary areas without any discomfort.