Related Experiment Video
Updated: Sep 13, 2025
03:47
Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application
Published on: September 27, 2024
1.1K
A Novel Peel to Prevent Post-Inflammatory Hyperpigmentation After CO2 Resurfacing for Acne Scars
Xiaozhun Hang1, Davin Sui Lim2
1Queensland Institute of Medical Research Berghofer, Herston, Queensland, Australia.
Journal of Cosmetic Dermatology
|July 30, 2025
Summary
A new peel effectively reduces post-inflammatory hyperpigmentation (PIH) after fractional carbon dioxide (CO2) laser resurfacing in patients with darker skin tones. This treatment improves PIH without impacting acne scar reduction outcomes.
Area of Science:
- Dermatology
- Aesthetic Medicine
- Laser Therapy
Background:
- Atrophic acne scars are a common concern, with fractional carbon dioxide (CO2) laser resurfacing being a standard treatment.
- Darker skin types (Fitzpatrick III-V) face a high risk of post-inflammatory hyperpigmentation (PIH) after CO2 laser treatment, limiting its application.
- Developing strategies to mitigate PIH is crucial for successful acne scar treatment in diverse skin populations.
Purpose of the Study:
- To evaluate the efficacy of a novel pre- and post-treatment peel in minimizing PIH after fractional CO2 laser resurfacing.
- To assess the impact of the adjunctive peel treatment on PIH incidence and severity in patients with Fitzpatrick skin types III-V.
- To analyze secondary outcomes including healing time and acne scar improvement.
Main Methods:
- Twenty-nine patients with atrophic acne scars underwent fractional CO2 laser resurfacing.
- A study group (n=15) received a novel peeling treatment before and after laser resurfacing.
- Post-inflammatory hyperpigmentation (PIH) was quantified using the Post-Inflammatory Hyperpigmentation Area and Severity Index (PIHASI) at 6 weeks; scar grading and healing time were also assessed.
Main Results:
- The group receiving the peel treatment exhibited significantly lower median PIHASI scores at 6 weeks compared to the control group (p=0.015).
- Re-epithelialization times were similar between the peel and no-peel groups (Day 6.4 vs. Day 6.2).
- No significant differences were observed in acne scar improvement between the groups, and no adverse events were reported.
Conclusions:
- The novel peel is effective in reducing the risk of PIH following fractional CO2 laser resurfacing in patients with higher Fitzpatrick skin types.
- The adjunctive peel treatment does not compromise acne scar treatment outcomes.
- Further research with larger patient cohorts is warranted to confirm the long-term effectiveness of this approach.
Related Concept Videos
01:14Changes in Skin Color: Clinical Perspectives
2.2K
The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
2.2K
01:19Clinical Applications of Epidermal Stem Cells
2.8K
Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
2.8K
01:19Pigmentation
2.7K
The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
2.7K
01:12Renewal of Skin Epidermal Stem Cells
2.6K
The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
2.6K