
The Complete Science of Acne Scarring
Acne scars are not a surface problem. They are the visible record of how inflammation reshaped the collagen scaffold beneath your skin. Understand that, and every treatment decision starts to make sense.
- Acne scars form when inflammation damages collagen in the dermis — the deeper support layer of the skin, not just the surface.
- Most acne scars are 'atrophic' (depressed) because tissue and collagen were lost during healing and never fully rebuilt.
- Post-inflammatory hyperpigmentation (PIH) is flat dark marking, not a true scar — it often fades, while scars need active treatment.



















