February 16, 2026•pigmentation, acne marks
Post-Inflammatory Hyperpigmentation Explained

Post-Inflammatory Hyperpigmentation (PIH) is a type of hyperpigmentation that can affect the face and body. It appears as flat spots of discoloration.
Causes of PIH
It typically occurs after skin inflammation or injury. Common causes include:
- Acne blemishes
- Eczema or psoriasis
- Insect bites
- Cuts or burns
How to Treat PIH
Unlike scars, PIH is pigment related. Treating it involves focusing on increasing cell turnover and inhibiting melanin.
- Exfoliation: Use AHAs like Glycolic Acid or Lactic Acid to potential remove surface pigment.
- Retinoids: Speed up cell turnover to bring new, even-toned skin to the surface faster.
- Sun Protection: UV exposure will darken PIH spots instantly.
Written by The Haven Sky Team
