Acne scars: how to get rid of them effectively?

Les acne scars can alter skin texture, leaving depressions or raised areas and dulling the complexion. Whether they are atrophic (indented) or hypertrophic (raised), they require appropriate management. In this article, we detail the types of acne scars, effective dermatological treatments, and essential precautions to know before any procedure. The goal? To regain smoother, more even, and soothed skin.

1. Understanding types of acne scars

  • Atrophic scars: indented or shaped like 'ice picks', 'U's, or 'boxcars' depending on their depth and width.

  • Hypertrophic scars: raised, due to an excess of collagen during the healing phase.
    These marks should not be confused with redness (post-inflammatory erythema) or pigment spots, which affect the superficial epidermis and generally fade faster.

2. When to consider professional treatments?

Before any treatment for acne scars, it is crucial that the inflammatory phase is completely resolved. For individuals who have undergone isotretinoin treatment, it is recommended to wait at least six months after stopping the treatment. Otherwise, any intervention risks triggering new breakouts.

3. Proven effective dermatological treatments

3.1 The dermatological peel

It uses powerful agents like phenol (15–60%) or trichloroacetic acid (TCA) (10–70%) to deeply exfoliate and stimulate skin regeneration. The result: smoother skin; but be aware that it becomes very sensitive during healing, and sun exposure must be strictly avoided. A study showed that a 70% TCA peel led to improvement in 66% of patients, with 81% satisfaction.

3.2 Microdermabrasion

This non-invasive method uses microcrystals or a diamond-tipped wand to mechanically exfoliate the superficial layers of the skin. By stimulating cell renewal, it promotes regeneration and collagen production. Several sessions (often 5 to 10) are necessary to see a visible effect on acne scars.

3.3 Laser

Particularly effective against hypertrophic scars, laser treatments (CO2 or Fraxel) create controlled 'injuries' to the skin to stimulate cell renewal. Combining it with other treatments – such as fractional radiofrequency or platelet-rich plasma (PRP) injections – significantly improves results.

3.4 Hyaluronic acid injections

Ideal for filling shallow atrophic scars, they restore volume to the skin. The effects are temporary, lasting 6 to 12 months depending on the case, and must be performed by a qualified professional.

3.5 Radiofrequency

This treatment deeply heats the dermis to stimulate fibroblasts and boost collagen production. It is particularly suitable for moderate atrophic scars, with 3 to 4 sessions spaced one month apart for visible results.

3.6 Corticosteroid injections

Used for hypertrophic scars, they help reduce their size by inhibiting excessive collagen production. They can precede mild cryotherapy and sometimes cause side effects (depigmentation, atrophy, infections).

3.7 Microneedling

This minimally invasive technique creates micro-perforations to trigger active skin repair and stimulate collagen synthesis. In a clinical study, 10 patients underwent 6 sessions and showed visible improvements, as well as a notable increase in collagens I, III, and VII.

4. Essential Prevention and Precautions

  • Never touch or pop pimples to avoid scars.

  • Consult a dermatologist at the first signs of acne outbreaks to prevent scarring risks.

  • Observe the necessary waiting periods after certain treatments (like isotretinoin) before starting any invasive procedure.

5. At-Home Adjuvant Routine

  • Daily sun protection: After treatments like peels or laser, the skin is very sensitive. The sun is a major enemy.

  • Constant hydration: Good hydration is essential to promote healing and maintain the skin's barrier.

  • Soothing care: After procedures, opt for gentle and healing formulations.

Conclusion

Acne scars can be faded, but rarely completely erased. Dermatological solutions such as peels, microdermabrasion, laser, injections (hyaluronic acid or corticosteroids), radiofrequency, and microneedling offer the prospect of reduced texture and smoother skin — provided they are performed by professionals.
Preventing scars by treating acne early and avoiding skin manipulation are equally essential. With a personalized and structured approach, you can significantly improve skin appearance and regain self-confidence.

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