dryness, allergies, rosacea, or heat, and regular foundation often just tones down the redness instead of actually neutralizing it.
I notice mine most in three situations: cold winter air, hot humid brunch patios, and any week my allergies are acting up. If I go straight in with medium-coverage foundation, the red still peeks through and I end up adding more and more product. The corrector step fixes that by doing the neutralizing work first.
