Scars, like diamonds, are forever. Right? That is not necessarily true. Made of silicone, scar tape touts that it can be placed over a wound to minimize scarring and accelerate the healing process.

Scars are a natural part of life, and there’s nothing that says you can’t have a scar—or five. But some scars are more noticeable than others. If you have a mark on your skin and it bothers you, it ...