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?
I’m not an expert, but I remember reading about a technique called z-plasty which plastic surgeons can use to help reduce the appearance of scars. Not exactly what you’re (hopefully theoretically) asking about, but this does involve re-opening the original scar.