The breakout healed. The color stayed. That dark mark is post-inflammatory hyperpigmentation: melanin deposited where the skin was injured by the acne. On Fitzpatrick IV–VI skin the marks last longer because the same inflammation that lights up an active spot also signals the melanocytes underneath. So the routine works in three moves — calm the input, work on the pigment with actives that fit deeper skin, and seal the barrier so UV doesn't restart it tomorrow.
Pigment fades on the skin's schedule, not yours. Give it twelve weeks before you judge a routine. Anything promising overnight results is selling you something the biology cannot deliver — and on melanated skin, the wrong overnight product creates the next dark mark instead.
Follow the order. PREP calms the inflammation that creates the next dark mark. TREAT works on the pigment that is already there. SEAL keeps UV from undoing everything you just did.
Every inflammation event is a new pigment deposit. So before any active, the routine has to stop creating new marks: gentle cleanser, no scrubs, no foam-stripped barrier, no picking the spot.
A gentle, fragrance-free, low-pH cleanser twice daily. Pat dry. If acne is active, a low-percent salicylic acid 2–3 nights a week can clear plugged pores without barrier damage — but never on the same night as the TREAT actives below.
The actives that actually move PIH on Fitzpatrick IV–VI skin. Pick one to start with; layer the second one in only after the first is steady for a month. More is not faster — more is irritation, and irritation creates the next dark mark.
Apply directly to the marks after cleansing, before moisturizer. Start once daily, build to twice if the skin stays calm. Twelve weeks before you decide whether it is working.
The boring step is the one that decides whether any of this holds. Ceramides rebuild the barrier so the actives keep working. Sunscreen blocks the UV that reactivates the exact pigment pathway you are trying to interrupt. Without these two, the routine pours water into a leaky bucket.
Niacinamide first to lock in the actives. Ceramide moisturizer on top. AM finishes with sunscreen — every day, regardless of weather, regardless of indoors. UV reactivates pigment through windows. There are no exceptions on Fitzpatrick IV–VI.
Picking the spot, scrubbing the mark, skipping sunscreen, and stacking three new actives in week one all guarantee the mark stays — or comes back darker. Over-the-counter hydroquinone is effective but carries ochronosis and paradoxical-darkening risk on deeper skin; it belongs in a dermatologist's hands, never as a self-managed daily product. Overnight “brightening” treatments built on undisclosed actives can contain mercury or unlabeled steroids — both create the kind of harm a routine cannot undo. The full science is here.
Take them in order.
Let Doctor Djeli read your current products and confirm the routine that fits your skin.