Long-Term Sunburn Discoloration: Treatment & Relief

Persistent erythema or hyperpigmentation after sunburn (post-inflammatory hyperpigmentation, PIH) reflects melanin dysregulation and dermal inflammation. Management focuses on protection, anti-inflammation, and pigment normalization.

Evidence-Based Topical Therapy

• Broad-spectrum SPF 30+ daily: Non-negotiable. UV perpetuates PIH. Reapply q2h outdoors.
• Topical retinoids: Tretinoin 0.025–0.05% or adapalene 0.1% – accelerate epidermal turnover, disperse melanin. Start 2–3×/week.
• Hydroquinone 2–4% (Rx): Gold standard for PIH – inhibits tyrosinase. Use ≤3 months; pulse thereafter.
• Azelaic acid 15–20%: Tyrosinase inhibitor + anti-inflammatory; safe in pregnancy.
• Vitamin C (L-ascorbic acid 10–20%): Antioxidant, inhibits melanogenesis, boosts collagen.
• Niacinamide 5%: Blocks melanosome transfer, improves barrier.
• Tranexamic acid 2–5% (topical/oral): Anti-plasmin → ↓ melanogenesis; emerging evidence for PIH/melasma.

Soothing Acute Inflammation

• Cool compresses, aloe vera gel (anti-inflammatory), colloidal oatmeal.
• Low-potency topical steroid (hydrocortisone 1%) × few days only – avoid atrophy.
• NSAIDs oral (ibuprofen) for first 24–48 hrs.

Procedural (if persistent >6–12 months)

• Chemical peels (glycolic, salicylic, TCA).
• Laser: Q-switched Nd:YAG, picosecond, fractional non-ablative.
• Microneedling + topical tranexamic acid.

Prevention

Sun protection is primary and secondary prevention. PIH can last years without it.