Medical disclaimer: This page is for educational purposes only. Deep atrophic or ice-pick scars typically require in-office procedures. Consult a dermatologist for severe scarring.

Post-acne marks are not scars in the clinical sense — most are temporary discolorations that fade with the right protocol. True acne scars involve structural changes to the dermis. Understanding which type you're dealing with determines which ingredients and interventions will actually work.

The Four Types of Post-Acne Damage

• PIE (Post-Inflammatory Erythema) — pink or red flat marks; vascular in origin; responds to anti-inflammatory ingredients and time
• PIH (Post-Inflammatory Hyperpigmentation) — brown or dark flat marks; melanin overproduction; responds to brightening actives and mandatory SPF
• Atrophic Scars — depressed scars (ice pick, boxcar, rolling); structural collagen loss; requires retinoids, peptides, or in-office procedures
• Hypertrophic/Keloid Scars — raised scars; excess collagen; requires dermatological intervention

Evidence by Scar Type

PIE — Pink/Red Marks

🟢 TIER 1: Centella asiatica reduces post-inflammatory erythema via NF-κB suppression. Kim et al. (2014), Journal of Cosmetic Dermatology, PMID 24471567. Niacinamide reduces redness via anti-inflammatory pathways. Time is the primary healer — most PIE resolves in 3–6 months with consistent barrier support and SPF.

PIH — Brown/Dark Marks

🟢 TIER 1: Niacinamide inhibits melanosome transfer — Hakozaki et al. (2002), British Journal of Dermatology, PMID 12100180. Tranexamic acid inhibits UV-induced melanogenesis — Ebrahimi & Naeini (2014), Journal of Research in Medical Sciences, PMID 25097630. Vitamin C inhibits tyrosinase — Telang (2013), Indian Dermatology Online Journal, PMID 23741676. SPF is non-negotiable — UV exposure darkens PIH and undoes all progress.

Atrophic Scars — Depressed Texture

🟢 TIER 1 (retinoids): Topical retinoids stimulate collagen synthesis and improve atrophic scar appearance over 6–12 months. Kang et al. (2005), Journal of the American Academy of Dermatology, PMID 15692471.

🟡 TIER 2 (peptides): GHK-Cu and PDRN have early evidence for collagen stimulation and tissue remodeling. See PDRN & GHK-Cu Protocol.

In-office options (beyond OTC scope): microneedling, fractional laser, subcision, and filler are the most evidence-supported interventions for moderate-to-severe atrophic scars.

The Post-Acne Scar Protocol

What Does NOT Work for Scars

Honest limitations: no OTC product fills depressed atrophic scars — that requires physical intervention. Vitamin E oil has no RCT support for scar improvement and may cause contact dermatitis. Coconut oil is comedogenic and worsens acne-prone skin. Lemon juice causes chemical burns and worsens PIH. Silicone sheets have evidence for hypertrophic scars only, not atrophic.

Timeline

PIE: 3–6 months with consistent protocol. PIH: 3–6 months with brightening actives + SPF. Atrophic scars: 6–12 months of retinoid use for mild improvement; moderate-to-severe requires in-office procedures.

Related Protocols

• Acne Protocol
• Brightening & Dark Spot Protocol
• PDRN & GHK-Cu Regenerative Peptide Stack
• Vitamin C Serum Guide
• The Complete Veracil Skincare System

Commercial disclosure: Veracil sells skincare products including some referenced in this protocol. All recommendations are based on ingredient evidence and protocol compatibility.