postinflammatory hyperpigmentation
Also written as: PIH — postinflammatory hyperpigmentation
Darkening of skin that occurs after inflammation resolves, more common in darker-skinned children.
Full Definition
Postinflammatory hyperpigmentation (PIH) is a common sequela of inflammatory skin conditions, presenting as darkened patches at sites of previous inflammation. It results from increased melanin production triggered by inflammatory mediators and is particularly common in children with darker skin types (Fitzpatrick IV-VI). PIH can follow various conditions including acne, eczema, infections, or trauma, and while it typically fades over months to years, it may be persistent and cosmetically concerning for patients and families.
Usage
Usage note: Hyphenate the compound modifier; PIH is an acceptable abbreviation after first use.
In Context
- "Postinflammatory hyperpigmentation at sites of resolved eczema was the primary cosmetic concern." — Dermatology consultation
- "The family was counseled that the postinflammatory hyperpigmentation would likely fade gradually over 6-12 months." — Patient education note