Is it OK to wear makeup for the dentist?

Depending on what exactly you are doing, your mouth may also be numb. Since the area around your mouth is likely to get dirty, it's best to avoid lipstick, foundation, and full-face powders. There is nothing wrong with using a little mascara or a touch of blush, but less really is more for a dentist appointment. The Dentist Doesn't Want to Use Your Lipstick The dentist is one of those places where you simply shouldn't wear lipstick.