Apply concealer to any blemishes and around your eyes. Applying your concealer before foundation helps keep foundation to a minimal amount. Make sure this is the exact same color as your skin. When you apply the concealer, do so directly on the spot and not around it. This is to avoid a halo effect and emphasis of the spot. Optionally set with beige powder.[1]
Be careful not to overdo it on the concealer; you only need enough to cover the spot.