Editor’s note: Since we first published this story in June, we’ve updated it with a video showing the fake freckles in action. Last summer, I couldn’t go anywhere — or look anywhere on Instagram — ...

When Hailey Buchanan was a little kid in the 2000s, other kids at school teased her for having freckles. She hated it. She came to hate the freckles themselves. Then, as we all do, Buchanan, 23, grew ...