Acne Scar Treatment: From PRP to Laser Therapy and Beyond

Acne scars are more than a cosmetic concern. For many people, they carry emotional weight that lasts far longer than the breakouts that caused them. Studies show that acne scarring is associated with reduced self-esteem, increased anxiety, and diminished quality of life [1]. The good news is that the treatment options available today are more effective than ever, particularly as regenerative medicine approaches enter the picture.

But acne scar treatment is not one-size-fits-all. The type of scar you have, your skin tone, your budget, and your tolerance for downtime all influence which treatments are likely to work best. This guide covers the major categories of acne scars, the treatment options supported by evidence, what to realistically expect from each approach, and how to build a treatment plan that makes sense for your situation.

Understanding the Types of Acne Scars

Before choosing a treatment, it helps to understand what you are dealing with. Acne scars fall into two broad categories: atrophic (depressed) and hypertrophic (raised). Atrophic scars are far more common and are further divided into three subtypes [2].

Ice Pick Scars

These are narrow, deep, V-shaped scars that extend into the dermis or even subcutaneous tissue. They look like the skin has been punctured with a sharp instrument. Ice pick scars are the most difficult type to treat because of their depth and narrow profile.

Boxcar Scars

Boxcar scars are wider than ice pick scars with well-defined, vertical edges. They can be shallow or deep. Think of them as small, round or oval depressions with sharp borders. Shallow boxcar scars respond well to resurfacing treatments, while deeper ones may require a combination approach.

Rolling Scars

Rolling scars create a wave-like, undulating appearance on the skin surface. They are caused by fibrous bands that tether the skin to deeper structures, pulling the surface downward. These scars tend to look worse in certain lighting angles and can often be identified by stretching the skin, which temporarily improves their appearance.

Hypertrophic and Keloid Scars

These raised scars result from excessive collagen production during wound healing. Hypertrophic scars stay within the boundaries of the original wound, while keloids extend beyond them. They are more common in darker skin tones and on certain body areas like the chest, shoulders, and jawline [2].

Post-Inflammatory Hyperpigmentation (PIH)

While not technically scars, the dark marks left behind after acne lesions heal are often lumped together with scarring. PIH is caused by excess melanin production during the inflammatory process and is especially common in darker skin tones. The good news is that PIH typically fades on its own over 3 to 12 months, and the process can be accelerated with topical treatments [3].

PRP Microneedling: A Regenerative Approach

Platelet-rich plasma (PRP) combined with microneedling has emerged as one of the most promising regenerative treatments for acne scars. The concept is straightforward: microneedling creates controlled micro-injuries that trigger the skin’s natural healing response, while PRP provides concentrated growth factors that amplify and accelerate that response.

How It Works

A small amount of your blood is drawn and processed in a centrifuge to concentrate the platelets, which contain growth factors like platelet-derived growth factor (PDGF), transforming growth factor beta (TGF-B), and vascular endothelial growth factor (VEGF). The PRP is then applied to the skin during or after microneedling, allowing the growth factors to penetrate through the micro-channels created by the needles [4].

What the Evidence Shows

A randomized controlled trial comparing PRP-assisted microneedling to microneedling alone found that the PRP group showed significantly greater improvement in acne scar severity, with better results in texture, depth, and overall scar appearance [4]. Another split-face study confirmed that the side treated with PRP plus microneedling showed superior improvement compared to microneedling alone [5].

The combination is particularly effective for rolling and shallow boxcar scars. Results develop gradually over 4 to 8 weeks as new collagen forms, and most patients need 3 to 6 sessions spaced 4 to 6 weeks apart.

Cost and Downtime

PRP microneedling typically costs $500 to $1,500 per session, depending on location and provider. Downtime is usually 2 to 4 days of redness and mild swelling, similar to a moderate sunburn. Most people can return to work the next day with makeup to cover the redness.

Fractional Laser Therapy

Fractional lasers remain the gold standard for moderate to severe acne scarring. These devices deliver laser energy in a grid pattern, treating a fraction of the skin surface while leaving surrounding tissue intact. This allows for faster healing and lower risk of complications compared to older fully ablative lasers [6].

Ablative Fractional Lasers

Fractional CO2 and erbium:YAG lasers vaporize columns of skin tissue, triggering significant collagen remodeling. They deliver the most dramatic results but come with the most downtime, typically 5 to 10 days of redness, swelling, and crusting.

A systematic review found that fractional CO2 laser treatment produced clinically significant improvement in acne scars, with studies reporting 25% to 75% improvement after one to three sessions [6]. These lasers work well for all three types of atrophic scars but are especially effective for boxcar and rolling scars.

Non-Ablative Fractional Lasers

Non-ablative fractional lasers (like the 1550nm or 1927nm Fraxel) heat tissue without vaporizing it, stimulating collagen production with less surface damage. Downtime is shorter (2 to 5 days), but more sessions are typically needed.

A randomized trial comparing ablative and non-ablative fractional lasers for acne scars found that while ablative treatment produced greater improvement per session, non-ablative treatment achieved comparable results over a larger number of sessions with less risk of adverse effects [7].

Important Considerations for Darker Skin

Fractional lasers carry a higher risk of post-inflammatory hyperpigmentation in darker skin tones (Fitzpatrick types IV to VI). Non-ablative lasers are generally safer for these skin types, and pre-treatment with a tyrosinase inhibitor like hydroquinone or tranexamic acid can further reduce risk [3]. Working with a provider experienced in treating diverse skin tones is essential.

Cost

Ablative fractional laser sessions typically run $1,000 to $3,000 per session. Non-ablative sessions are usually $500 to $1,500. Most patients need 2 to 5 sessions depending on scar severity.

Chemical Peels

Chemical peels have been used for acne scar treatment for decades. They work by applying a chemical solution that removes the outer layers of skin, stimulating new cell growth and collagen production.

Types and Depth

Superficial peels (glycolic acid, salicylic acid at low concentrations) provide mild improvement and are best for PIH and very shallow scars. They require no downtime but also deliver minimal results for true acne scars.

Medium-depth peels (trichloroacetic acid or TCA at 20% to 35%) penetrate to the papillary dermis and can produce meaningful improvement in shallow to moderate acne scars. A study found that 35% TCA peels combined with the “CROSS” technique (Chemical Reconstruction of Skin Scars) were effective for ice pick and narrow boxcar scars [8].

The TCA CROSS technique involves applying high-concentration TCA (70% to 100%) directly into individual scars using a toothpick or fine applicator. This focal destruction triggers collagen formation from the bottom of the scar, gradually raising depressed scars to the surface level. Studies report 50% to 70% improvement in ice pick scars after 3 to 6 sessions [8].

Deep peels (phenol-based) are rarely used today due to the risk of complications and the availability of better alternatives.

Cost

Chemical peels range from $150 to $300 for superficial peels, $300 to $700 for medium-depth peels, and $200 to $500 per TCA CROSS session.

Subcision

Subcision is a minor surgical procedure specifically designed for rolling scars. A needle or small blade is inserted under the scar to break the fibrous bands that tether the skin to deeper tissues [9]. Once these bands are released, the skin can spring back to a more normal surface level.

Evidence and Technique

A study evaluating subcision for rolling acne scars reported marked improvement in the majority of treated patients, with results improving over several months as new collagen filled the space created by the released bands [9]. Subcision is often combined with other treatments, particularly filler injection or PRP, to prevent the bands from reforming and to provide additional volume.

The combination of subcision with hyaluronic acid filler is particularly effective. The filler acts as a spacer that prevents reattachment of the fibrous bands while providing immediate volume correction.

Cost and Downtime

Subcision costs $200 to $600 per session. Bruising is common and can last 7 to 14 days. Some practitioners use a cannula instead of a needle, which tends to produce less bruising.

Dermal Fillers

Injectable fillers can provide immediate improvement for depressed acne scars by physically adding volume beneath the scar. The two main approaches are temporary fillers and semi-permanent options.

Hyaluronic Acid Fillers

Hyaluronic acid (HA) fillers like Restylane and Juvederm are the most commonly used temporary fillers for acne scars. They provide immediate results, are reversible (the enzyme hyaluronidase can dissolve them if needed), and typically last 6 to 18 months depending on the product and location [10].

A randomized trial found that HA filler injection significantly improved the appearance of distensible acne scars (those that improve when the skin is stretched) compared to saline injection [10].

Poly-L-Lactic Acid (Sculptra)

Sculptra works differently from HA fillers. Rather than providing immediate volume, it stimulates your body’s own collagen production over 2 to 6 months. Results can last two years or more. It is particularly useful for large areas of volume loss and widespread rolling scars [11].

Bellafill

Bellafill is the only FDA-approved filler specifically indicated for acne scar correction. It contains polymethylmethacrylate (PMMA) microspheres suspended in collagen, providing both immediate correction and long-term structural support. A five-year study showed sustained improvement in acne scar appearance [11].

Cost

Filler treatments for acne scars typically cost $600 to $1,500 per session, depending on the amount of product needed and the type of filler used.

Combining Treatments for Best Results

The most effective approach to acne scar treatment is almost always a combination strategy tailored to the specific types of scars present. A reasonable framework looks like this:

Ice pick scars: TCA CROSS followed by fractional laser resurfacing
Boxcar scars (shallow): Fractional laser, chemical peels, or PRP microneedling
Boxcar scars (deep): Punch excision or subcision followed by fractional laser
Rolling scars: Subcision with filler or PRP, followed by fractional laser or microneedling
PIH: Topical treatments (vitamin C, niacinamide, azelaic acid, retinoids) with or without superficial peels

A study comparing combination therapy to single-modality treatment found that patients receiving combined subcision, fractional laser, and PRP achieved significantly greater scar improvement than those receiving any single treatment alone [12].

Expected Timeline and Setting Realistic Expectations

Acne scar treatment is a process, not a single event. Here is a realistic timeline:

• Month 1 to 2: Initial consultation, skin preparation (retinoids, sun protection), first treatment session
• Month 2 to 6: Ongoing treatment sessions (most protocols require 3 to 6 sessions spaced 4 to 6 weeks apart)
• Month 6 to 12: Continued collagen remodeling and gradual improvement
• Month 12 and beyond: Maintenance treatments as needed

Most patients can expect 40% to 70% improvement with a well-designed treatment plan. Complete elimination of scars is rarely achievable, but significant improvement in texture, depth, and overall appearance is realistic for the majority of patients [6].

Total cost for a full treatment course typically ranges from $2,000 to $10,000, depending on the severity of scarring and the treatments selected.

Prevention: Stopping New Scars Before They Form

While treating existing scars, it is equally important to prevent new ones from forming. Active acne should be treated aggressively, as early intervention reduces the risk of permanent scarring [13].

Key prevention strategies include:

• Do not pick, squeeze, or pop acne lesions
• Treat inflammatory acne promptly with appropriate medications
• Use retinoids, which can reduce scarring risk even after lesions develop
• Protect healing skin from UV exposure, which can worsen PIH

When to See a Doctor

Consult a dermatologist or qualified aesthetics provider if:

• Over-the-counter treatments have not improved your acne scars after 6 months
• You have deep or widespread scarring affecting your quality of life
• Your acne is still active (treating scars while acne is ongoing is less effective)
• You have a history of keloid scarring (some treatments can worsen keloids)
• You have darker skin and are considering laser treatment (specialized expertise is important to avoid complications)

A board-certified dermatologist or a provider with specific training in scar revision can assess your scars, identify the subtypes present, and develop a treatment plan that addresses each one appropriately.

The Bottom Line

Acne scar treatment has come a long way. Regenerative approaches like PRP microneedling offer the body’s own growth factors as a healing tool, while fractional lasers, chemical peels, subcision, and fillers each address different aspects of scarring. The best results come from a personalized combination approach that matches treatments to scar types.

Patience is essential. Collagen remodeling takes months, and multiple sessions are almost always necessary. But with a well-designed treatment plan and realistic expectations, meaningful improvement is achievable for nearly everyone dealing with acne scars.

References

[1] Layton AM, Henderson CA, Cunliffe WJ. A clinical evaluation of acne scarring and its incidence. Clin Exp Dermatol. 1994;19(4):303-308. doi:10.1111/j.1365-2230.1994.tb01200.x

[2] Jacob CI, Dover JS, Kaminer MS. Acne scarring: a classification system and review of treatment options. J Am Acad Dermatol. 2001;45(1):109-117. doi:10.1067/mjd.2001.113451

[3] Callender VD, St. Surin-Lord S, Davis EC, Maclin M. Postinflammatory hyperpigmentation: etiologic and therapeutic considerations. Am J Clin Dermatol. 2011;12(2):87-99. doi:10.2165/11536930-000000000-00000

[4] Asif M, Kanodia S, Singh K. Combined autologous platelet-rich plasma with microneedling verses microneedling with distilled water in the treatment of atrophic acne scars: a concurrent split-face study. J Cosmet Dermatol. 2016;15(4):434-443. doi:10.1111/jocd.12207

[5] Ibrahim MK, Ibrahim SM, Salem AM. Skin microneedling plus platelet-rich plasma versus skin microneedling alone in the treatment of atrophic post acne scars: a split face comparative study. J Dermatolog Treat. 2018;29(3):281-286. doi:10.1080/09546634.2017.1365111

[6] Connolly D, Vu HL, Mariwalla K, Saedi N. Acne scarring-pathogenesis, evaluation, and treatment options. J Clin Aesthet Dermatol. 2017;10(9):12-23. PMID:29344322

[7] Cho SB, Lee SJ, Cho S, et al. Non-ablative 1550-nm erbium-glass and ablative 10,600-nm carbon dioxide fractional lasers for acne scars: a randomized split-face study with blinded response evaluation. J Eur Acad Dermatol Venereol. 2010;24(8):921-925. doi:10.1111/j.1468-3083.2009.03551.x

[8] Lee JB, Chung WG, Kwahck H, Lee KH. Focal treatment of acne scars with trichloroacetic acid: chemical reconstruction of skin scars method. Dermatol Surg. 2002;28(11):1017-1021. doi:10.1046/j.1524-4725.2002.02095.x

[9] Alam M, Han S, Pongprutthipan M, et al. Efficacy of a needling device for the treatment of acne scars: a randomized clinical trial. JAMA Dermatol. 2014;150(8):844-849. doi:10.1001/jamadermatol.2013.7028

[10] Halachmi S, Ben Amitai D, Lapidoth M. Treatment of acne scars with hyaluronic acid: an improved approach. J Drugs Dermatol. 2013;12(7):e121-e123. PMID:23884501

[11] Karnik J, Baumann L, Brody HJ, et al. A double-blind, randomized, multicenter, controlled trial of suspended polymethylmethacrylate microspheres for the correction of atrophic facial acne scars. J Am Acad Dermatol. 2014;71(1):77-83. doi:10.1016/j.jaad.2014.02.034

[12] Abdel Hay R, Shalaby K, Zaher H, et al. Interventions for acne scars. Cochrane Database Syst Rev. 2016;4(4):CD011946. doi:10.1002/14651858.CD011946.pub2

[13] Tan J, Kang S, Leyden J. Prevalence and risk factors of acne scarring among patients consulting dermatologists in the USA. J Drugs Dermatol. 2017;16(2):97-102. PMID:28291559