When applying green color corrector, the most important thing to do be aware of is the blending, as it's not always easy to apply color corrector the right way. If it's one pimple, rather than a couple or a group, it's best to use a brush. "Fingers tend to blend product away, so it doesn't cover as well," Dell Ashley, director of makeup artistry for YSL Beauty, warned Glamour. 

"If you can't blend the green so that your skin tone looks even, you'll look way worse off than when you have redness," makeup artist Jenny Patinkin added — you might even look green. In this case, you can fix it with a little water. "If you over-apply a cream- or gel-based green color corrector, you can sheer it out by using a damp sponge to lift away excess product," she continued.