Treatment Options for Post-Inflammatory Hyperpigmentation (PIH)

First-Line Treatments

Chemical peels, particularly glycolic acid and salicylic acid peels, are the most effective first-line treatment options for post-inflammatory hyperpigmentation (PIH), with chemical peeling showing superior results compared to other modalities, as recommended by the American Academy of Dermatology 1
Retinoids help with epidermal PIH by increasing keratinocyte turnover, according to the American Academy of Dermatology 2

Glycolic acid peels (20-70%) and salicylic acid peels (20-30%) are effective for PIH, particularly for PIH secondary to acne, as stated by the American Academy of Dermatology 1
Chemical peels have demonstrated superior efficacy compared to other treatments like PRP, as reported by the Periodontology 2000 2

Azelaic acid is recommended for the treatment of postinflammatory dyspigmentation in acne patients, according to the American Academy of Dermatology 3

For maintenance after initial improvement and for resistant cases, treatment strategies are recommended, including non-hydroquinone agents, as suggested by the American Academy of Dermatology 3

Tranexamic acid is being investigated for its role in PIH management, as reported in Periodontology 2000 4

Chemical peels, particularly glycolic acid (20-70%) and salicylic acid (20-30%) peels, are effective for resistant post-inflammatory hyperpigmentation, with a treatment protocol typically involving application every 15 days for 4-6 months, as recommended by the Journal of the American Academy of Dermatology 5
Post-procedural inflammation that may exacerbate hyperpigmentation should be monitored, according to the British Journal of Dermatology 6

Apply anti-inflammatory agents immediately after treatment to reduce inflammation that leads to PIH, as recommended by the British Journal of Dermatology 7
Use 0.1% prednisolone solution or other topical corticosteroids to reduce inflammation, according to the International Journal of Oral Science 8
Implement strict photoprotection for at least 48 hours after treatment, with continued protection throughout the entire treatment course, as suggested by the International Journal of Oral Science 8
Ascorbic acid (vitamin C) can be used for its antioxidant properties to help manage PIH, as noted by the British Journal of Dermatology 7

Oral prednisone 15–30 mg daily for 3–5 days can rapidly suppress the inflammatory response in severe sunburns, thereby lowering the risk of melanocyte activation and subsequent hyperpigmentation. Evidence level: moderate (clinical study) 9

Apply broad‑spectrum sunscreen (SPF ≥ 30) to all previously burned skin every 2–3 hours during outdoor exposure. This regimen consistently shows high‑quality evidence for preventing post‑inflammatory hyperpigmentation. American Academy of Dermatology 10
Wear protective clothing and broad‑brimmed hats when outdoors as part of a comprehensive photoprotection protocol; supported by high‑quality evidence. American Academy of Dermatology 10
Apply sunscreen even when indoors near windows or while traveling in a car, because UVA radiation penetrates glass and can trigger pigmentation. This practice is backed by consistent high‑quality evidence. American Academy of Dermatology 10
Continue photoprotection for at least 8 weeks after complete healing, recognizing that indoor lighting can transmit UVA through windows and sustain pigmentation risk. American Academy of Dermatology 10