Post-Inflammatory Hyperpigmentation
Post-inflammatory hyperpigmentation (PIH) is a common skin condition where dark spots or patches occur following acne or skin injury from multiple causes. It occurs as a response to skin inflammation, causing an overproduction of melanin (pigment).
Post-inflammatory hyperpigmentation (PIH) are dark marks that appear on your skin after acne or skin trauma. These spots are caused by left over inflammation, which leads to extra pigment in the skin. PIH is more common in people with darker skin tones and can take a long time to fade, sometimes lasting for years if untreated. While the spots aren't permanent, Dermatologists often combine treatments, such as topical creams alongside laser therapy, to achieve the best results. Regular follow-ups ensure safe and effective progress.
The Science Behind It
Post-inflammatory hyperpigmentation (PIH) occurs when skin inflammation, such as from acne, triggers an overproduction of melanin, the pigment responsible for skin colour. This results in dark spots or patches that can range from brown to gray, depending on skin type and the depth of pigmentation. Inflammation activates pigment-producing melanocytes, depositing excess melanin in the epidermis (surface layer) or dermis (deeper layer). UV exposure can worsen PIH by stimulating further melanin production. While PIH often fades over time, laser therapy can help accelerate the process and restore an even skin tone.
What are the best lasers for post-inflammatory hyperpigmentation?
For Post-Inflammatory Hyperpigmentation (PIH), treatment focuses on safely breaking up excess pigment while supporting skin recovery and preventing recurrence. A picosecond laser can help target stubborn pigmentation, while Acclaro UltraClear may be used to improve overall tone and texture when appropriate. Bioremodulator injections can support skin repair and resilience, and Secret RF may be added to refine texture and strengthen the skin barrier—often as part of a layered plan tailored to your skin tone, trigger factors, and how reactive your pigmentation is.
Treatment at a Glance
| Treatment Type | Number of Sessions | Procedure Time | Typical Recovery |
|---|---|---|---|
| Acclaro UltraClear® | 2 - 5+ sessions | 10 - 30 minutes | 3 - 5+ days |
| Biomodulator / Biostimulator Injections | 3 sessions - every 3-4 weeks, for 3 months | 30 minutes | Slight redness and swelling for 48 hours |
| Picosecond laser | 2 - 5+ sessions | 10 - 30 minutes | 3 - 5+ days |
| Secret RF | 2 - 4 sessions | 40 minutes | 3 - 5 days |
Frequently Asked Questions
Post-Inflammatory Hyperpigmentation (PIH) is a type of darkening of the skin that appears after inflammation or injury—most commonly after acne, eczema, dermatitis, insect bites, or irritation from skincare treatments. It isn’t a “scar” in the traditional sense; it’s extra pigment produced during the skin’s healing process. PIH can fade over time, but treatment can help it clear faster and more evenly.
Important ACC & Treatment Disclaimer
ACC funding eligibility is determined by the Accident Compensation Corporation on a case-by-case basis. Approval is dependent on injury acceptance, clinical indication, and ACC policy at the time of application. Not all treatments offered at Scars & Lasers are ACC-funded. Private fees may apply for unfunded components of care.
Learn more about ACC IncidentsTargeted pigment correction guided by specialist dermatology—restoring clarity, tone, and confidence after inflammation.
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