If I have a very thin piece of scar tissue on my skin, and then I surgically cut the skin open right along the middle of the scar, and ensure that I do all the best scar healing practises (like holding the skin on either side of the wound together), what will happen? Will the scar get smaller or bigger?
Much larger. Don’t do this.
If you’re willing to go through all that, though, consider microneedling.
It’s basically tattooing without ink.