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Post-acne marks (PIE & PIH) in your teens: the Korean approach

⏱ 1 min read
⚡ Quick answer: Post-acne marks (PIE & PIH) in your teens: Hormonal oil production peaks and the barrier is generally robust — the risk at this stage is over-treating, not under-treating. The Korean approach leans on Niacinamide (B3), Alpha-Arbutin, Tranexamic Acid, introduced one at a time and always finished with daily sunscreen.

Post-acne marks (PIE & PIH) in your teens: Hormonal oil production peaks and the barrier is generally robust — the risk at this stage is over-treating, not under-treating. The Korean approach leans on Niacinamide (B3), Alpha-Arbutin, Tranexamic Acid, introduced one at a time and always finished with daily sunscreen.

What is different about this stage

Hormonal oil production peaks and the barrier is generally robust — the risk at this stage is over-treating, not under-treating.

What post-acne marks (pie & pih) looks like here

The red or brown marks a blemish leaves behind long after it has healed — flat, not indented.

Ingredients to lean on

🧫 Niacinamide (B3)🫐 Alpha-Arbutin⚪ Tranexamic Acid🌿 Centella (Cica)🌾 Azelaic Acid
⚠️ Be careful with: Picking, and sun exposure without SPF — both deepen and prolong marks
💡 Tip: Flat marks fade; indented scars need a clinic. Red marks (PIE) and brown marks (PIH) respond to different actives, so identify which you have before buying anything.

🎯 Full post-acne marks (pie & pih) guide →🏆 Ranked ingredients →

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Explore more K-beauty guides → ⏭ Up next🧒 Reactive & easily-stung skin in your teens: the Korean approach
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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.

General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.