Piercings do have the potential of leaving a scar. The jewelry can easily be removed however, irreversible changes to the body can happen, including discoloration, a mark such as a scar, bump, dimple, or a permanent hole.  Many piercings shrink or close quickly, but some piercing will remain open indefinitely without jewelry in them. It all depends on the placement of the hole, the length of time you have worn the piercing, and the thickness of the jewelry that was in it.