(Question) Does repeated laser treatments make the skin thinner?

I have severe blackheads and whiteheads on my nose, so I am considering getting laser treatment. I am looking into Fraxel-type lasers that improve pores and scars. I heard that to improve pores, a single session isn't enough and requires repeated treatments. I also heard that repeated laser treatments can thin the skin; is that true? Additionally, I am curious about the potential side effects of lasers and what care methods are available to prevent them.