Pimple patches are everywhere, but do they work?

It’s been around since the 1980s and first became popular in ostomy care. You may recognize hydrocolloid from those blister pads you can buy at drugstores. The material absorbs fluid from a wound, forming a gel that gets trapped in the bandage, turning the area of the bandage white. “It’s almost miraculous,” says Dr. Gary Brauner.