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?
It will certainly not affect the existing scar tissue, if anything, the new wound will scar at worst, and heal with no new scar tissue at best.