As I have said in my other posts, some people do scar easily. We are all different. Some have only injections as kids on their arms, yet form large keloids which have to be removed surgically.
If you do not scar easily, the scar will be invisible, not raised, not even seen unless someone knows you've had surgery and peers very closely at the known site. At a glance there should be no visible scar. If you do not scar easily.
How do you tell if you scar easily. Well look at your bcg , childhood innoculation sites. Did they leave visible scars? Or at knee cap areas, when you fell as a child, did the wounds leave unsighlty scars that are raised?