Postinflammatory Hyperpigmentation

What is Postinflammatory Hyperpigmentation (PIH)?

Postinflammatory hyperpigmentation (PIH) is a common skin condition where dark patches appear after inflammation or injury. It is more prevalent and severe in individuals with darker skin tones (Fitzpatrick skin types III-VI).

What causes Postinflammatory Hyperpigmentation?

PIH occurs when skin cells produce excess melanin following irritation or injury. Common triggers include acne, eczema, and certain medical or cosmetic procedures like laser therapy and chemical peels.

How do we treat Postinflammatory Hyperpigmentation

To reduce the appearance of freckles, consider the following methods:

Topical Agents

• Various over the counter and prescription topical ingredients can help to speed up resolution of PIH.

Professional Treatments

• Chemical Peels can help to remove pigmented skin cells

• Laser Therapy: Q-switched lasers and fractional photothermolysis target deeper pigmentation.

• LED Therapy: Reduces inflammation and promotes even skin tone.

Photoprotection

• Use broad-spectrum sunscreen with SPF 50+ to prevent further pigmentation . 

Prognosis


• Epidermal (superficial) PIH may resolve in 6-12 months, while dermal (deeper) PIH can persist longer.

• Treatment can be prolonged, requiring patience and consistent care.