Post-Inflammatory Erythema (PIE) are those stubborn pink or purple marks left behind by inflammation. Our Acne Control Serum uses high-potency Niacinamide to calm the dilated capillaries responsible for this discoloration. It speeds up the skin's natural healing process and restores a uniform tone. Unlike harsh lighteners, this formula builds skin resilience while it brightens. Stop letting past breakouts define your skin's look; start active recovery and fade those marks fast.