TL;DR
Irritation is the hidden driver of PIH: harsh scrubs, high alcohol, fragrance, and over-exfoliation inflame skin and deepen marks. Calm skin fades faster than treated-but-angry skin.
- #1 trigger
- Irritation / inflammation
- Avoid
- Physical scrubs, fragrance, high alcohol
- Avoid
- Daily strong exfoliation
- Fix
- Repair barrier, then treat
The direct answer
The biggest enemy of fading marks is not a missing serum — it is inflammation. Anything that stings, burns, or over-strips the skin can create new PIH on top of the old.
Common culprits
- Physical scrubs and stiff brushes — micro-tears inflame skin.
- Fragrance and essential oils — frequent sensitisers.
- High-alcohol toners and astringents — break the barrier.
- Daily strong exfoliation (AHAs/BHAs) — thins and irritates.
The better approach
Repair the barrier first with a simple moisturiser, then add one gentle pigment active at a time. Skin that is calm fades marks far more reliably than skin that is treated but constantly irritated.
FAQ
Why did my marks get darker after using a scrub?
Scrubbing causes micro-injury and inflammation, which signals melanocytes to deposit more pigment exactly where you scrubbed.
Is exfoliating bad for pigmentation?
Not inherently — but daily or strong exfoliation backfires. Limit to 1–2×/week and stop if the skin stings.
Fragrance-free really necessary?
For pigmentation-prone, reactive skin, fragrance is a top avoidable irritant. Fragrance-free lowers the risk of flare-ups that deepen marks.