---
title: Post-Inflammatory Erythema
entity_type: Concern
canonical_url: https://skinknowledgebase.com/concerns/post-inflammatory-erythema
date_modified: 2026-05-26
date_reviewed: 2026-05-26
mcp_eligible: true
summary: Post-inflammatory erythema is the pink or red-looking mark that can linger after acne, especially after inflammation or picking. Routine choices should stay
no_product_rationale: No ranked product is included because post-inflammatory erythema is a redness pattern where irritation risk and time course matter; the safer public guidance is gentle ingredient categories, sunscreen, and clinician signposts rather than naming a single product.
key_ingredients:
  - title: Azelaic Acid
    url: https://skinknowledgebase.com/ingredients/azelaic-acid
  - title: Niacinamide
    url: https://skinknowledgebase.com/ingredients/niacinamide
  - title: Centella Asiatica
    url: https://skinknowledgebase.com/ingredients/centella-asiatica
evidence_sources:
  - title: AAD — How to fade dark spots in darker skin tones
    canonical_citation_url: https://skinknowledgebase.com/sources/aad-fade-dark-spots-darker-skin-tones
    original_source_url: https://www.aad.org/public/everyday-care/skin-care-secrets/routine/fade-dark-spots
    source_type: other
  - title: DermNet — Postinflammatory hyperpigmentation
    canonical_citation_url: https://skinknowledgebase.com/sources/dermnet-postinflammatory-hyperpigmentation
    original_source_url: https://dermnetnz.org/topics/postinflammatory-hyperpigmentation
    source_type: medical_reference
product_fact_sources: []
---

# Post-Inflammatory Erythema

## Quick Summary

Post-inflammatory erythema, often shortened to PIE, is the red or pink-looking mark that can linger after acne calms down. It is different from brown hyperpigmentation and from indented scarring.

## Causes

Inflammation, picking, squeezing, and irritation can leave visible red marks after blemishes. Sunscreen, time, gentle routines, and calming ingredients can help the look, while persistent vascular marks may need clinician options.

## Related Entities

- [AAD — How to fade dark spots in darker skin tones](https://skinknowledgebase.com/sources/aad-fade-dark-spots-darker-skin-tones)
- [Postinflammatory hyperpigmentation](https://skinknowledgebase.com/sources/dermnet-postinflammatory-hyperpigmentation)
- [Azelaic Acid](https://skinknowledgebase.com/ingredients/azelaic-acid)
- [Niacinamide](https://skinknowledgebase.com/ingredients/niacinamide)
- [Centella Asiatica](https://skinknowledgebase.com/ingredients/centella-asiatica)
- [How do I fade red marks after acne?](https://skinknowledgebase.com/questions/how-do-i-fade-red-marks-after-acne)
- [How do I get rid of red spots after pimples?](https://skinknowledgebase.com/questions/how-do-i-get-rid-of-red-spots-after-pimples)