Post-Inflammatory Hyperpigmentation (PIH)
Post-inflammatory hyperpigmentation (PIH) refers to the brown or dark patches left behind after inflammation or injury to the skin. It is especially common after acne breakouts, eczema or rashes, insect bites, cuts, scrapes, or burns. PIH is not a scar and often fades with time — but in many cases it lingers for months or years, particularly in people with darker skin tones. At DermLab, our Dermatologists provide specialist diagnosis and safe, effective treatments to speed clearance and restore even skin tone.
Signs & Symptoms
Flat, brown or greyish patches of skin
Appear after healing of acne, eczema, bites, or other skin injuries
Can be localised (one patch) or widespread (multiple marks on face or body)
Harmless, but cosmetically distressing
Treatment at DermLab
Prescription creams — hydroquinone, retinoids, or combination therapies to fade pigmentation
Chemical peels — to accelerate turnover and lighten marks
Laser treatments (pigment & CO2 laser) — for resistant cases, carefully selected by Dermatologists
Sun protection — daily sunscreen to prevent PIH from darkening
Lifestyle & skincare advice — avoiding triggers like picking, harsh scrubs, or irritants
Causes & Risk Factors
Inflammation or trauma — triggers excess melanin production
Skin type — more common and more persistent in darker skin
Sun exposure — darkens pigmentation and slows healing
Inappropriate treatment — harsh skincare, picking at acne, or unsuitable laser/peels can worsen PIH
Frequently Asked Questions
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No — it often fades with time, but may take months to years without treatment.
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Melasma is hormonally driven and symmetrical, while PIH follows a clear trigger (like acne or eczema). Dermatologists can distinguish between the two.
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Yes. Sun exposure darkens pigmentation and delays fading. Daily sunscreen is essential.
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