Treating Scarring Requiring Microneedling or Resurfacing: What Actually Works

Expert Evaluation and Evidence-Based Management

Scarring is one of the most common and emotionally impactful skin concerns that patients bring to a dermatologist. Whether scars developed from acne, surgery, trauma, or another skin injury, they have a way of staying visible long after the original wound has healed. Their texture, color, and depth can affect the way the skin catches light and how a patient feels in their own skin.

Fortunately, scarring is treatable. While no treatment erases a scar completely, microneedling, laser resurfacing, and related procedures can produce meaningful improvements in scar texture, depth, and overall appearance. Whether you are dealing with shallow acne scars that roughen the skin surface, deeper pitted scars, or flat surgical scars that have healed with visible changes to the skin, the right treatment plan can make a significant difference.

In this guide, we break down how scarring is treated with microneedling and resurfacing techniques: what works best for different scar types and skin tones, what results look like over time, and what a dermatologist can do to build a personalized plan that delivers the best possible outcome for your specific scars.

What Is Scarring and Why Is It So Stubborn?

Scarring occurs when the skin’s wound-healing process produces collagen that does not perfectly replicate the original tissue architecture. The result is a structural change in the skin that is visible as a difference in texture, color, or depth compared to the surrounding skin. Scars can be flat, raised, depressed, pigmented, or hypopigmented depending on the type of injury and the individual’s healing response.

The most common types of scars addressed with microneedling and resurfacing include:

• Atrophic Acne Scars: The most common category of acne scarring, caused by collagen loss during healing of inflammatory acne lesions. Subtypes include icepick scars (narrow, deep, V-shaped), boxcar scars (broad, flat-bottomed depressions with defined edges), and rolling scars (broad, shallow, undulating depressions with sloping edges).
• Post-Inflammatory Erythema (PIE): Persistent pink or red discoloration remaining at the site of a healed acne lesion. Caused by residual vascular changes rather than true structural scarring.
• Post-Inflammatory Hyperpigmentation (PIH): Flat brown or dark discoloration left after acne or other inflammatory skin conditions. Caused by excess melanin production at the site of inflammation.
• Surgical and Traumatic Scars: Scars from surgical incisions, lacerations, burns, or physical skin injury. These vary widely depending on the depth of the original wound, location, and how the wound healed.
• Stretch Mark Scars: Atrophic striae that benefit from collagen-stimulating techniques used for other types of dermal scarring.
• Risk factors that increase the likelihood of developing significant scarring include:
• Inflammatory or Cystic Acne: Deeper, more inflamed acne lesions produce more dermal destruction and are associated with more significant atrophic scarring.
• Picking or Manipulating Acne Lesions: Squeezing, picking, or traumatizing active acne lesions dramatically increases the risk of persistent scarring.
• Skin Tone: Individuals with medium to darker skin tones are more prone to post-inflammatory hyperpigmentation after skin injury or treatment.
• Delayed Treatment of Active Acne: Allowing inflammatory acne to remain untreated increases cumulative dermal damage and scarring risk.
• Deep Wound or Surgical Incision: The deeper and more extensive the original skin injury, the more likely it is to produce visible, permanent scarring.
• Genetics: The tendency to form certain scar types has a hereditary component.

Why Scars Are Hard To Treat

Scars are challenging to treat for two fundamental reasons:

• They represent a permanent structural change in the dermis. The collagen architecture within a scar differs from that of normal skin. Reversing this difference requires treatments that actively rebuild and remodel dermal collagen rather than simply treating the skin surface.
• Collagen remodeling is a slow biological process. Significant improvement from microneedling or laser resurfacing develops over months, not weeks, as the skin produces new collagen in response to treatment. Multiple sessions are typically needed, and results continue improving for months after each treatment.

This means that treating scarring requires patience, a consistent treatment plan, and realistic expectations about the pace of improvement.

Assess Your Scars Before Treating

Not all scars are the same, and selecting the right treatment approach requires a careful assessment of the scar type, depth, skin tone, and overall skin health. Key evaluation points include:

• Scar Type and Depth: Icepick scars are too deep and narrow to respond well to surface resurfacing alone and often require TCA CROSS before or alongside resurfacing. Boxcar and rolling scars respond well to collagen-stimulating treatments like microneedling and fractional laser. Shallow, textural scars respond to a broad range of resurfacing techniques.
• Skin Tone: This is one of the most critical factors in treatment selection. Ablative laser resurfacing carries a higher risk of pigmentation changes in darker skin tones. Microneedling and RF microneedling have a more favorable safety profile across a wider range of complexions.
• Active vs. Stable Skin: Active inflammatory acne must be well-controlled before beginning any resurfacing procedure to avoid triggering new breakouts or worsening post-inflammatory pigmentation.
• Severity and Distribution: Widespread scarring across large areas may require a field treatment approach with multiple sessions, while isolated scar clusters can sometimes be treated more selectively.

A thorough evaluation at Connolly Dermatology ensures that the right technique is selected for your scar type and skin before any procedure begins.

Treating Scarring Requiring Microneedling or Resurfacing: Treatment Options Compared

The right treatment depends on the scar type, its depth and distribution, your skin tone, and your downtime tolerance. In most cases, a combination approach or a series of treatments produces significantly better results than a single session.

Microneedling

Microneedling creates a series of controlled micro-injuries in the dermis using a device with fine, adjustable-depth needles. This triggers the skin’s natural wound-healing cascade, stimulating fibroblasts to produce new collagen and elastin within and around the scar tissue. Over a series of sessions, this new collagen gradually fills atrophic depressions, smooths the skin surface, and improves overall scar texture and visibility.

Microneedling is one of the most versatile scar treatment options because it is effective across a wide range of skin tones, requires minimal downtime (typically 1 to 2 days of redness), and can be used on the face, neck, chest, and body. A series of 3 to 6 sessions spaced 4 to 6 weeks apart is standard for most scar patients, with results continuing to improve for 3 to 6 months after each session.

Tips to maximize microneedling results:

• Use a prescription retinoid between sessions as recommended to support collagen production and improve skin cell turnover
• Protect the skin from sun exposure with SPF 30 or higher daily throughout the treatment series
• Ensure active acne is well-controlled before beginning and during the treatment series
• Complete the full recommended series rather than stopping after 1 or 2 sessions

Radiofrequency Microneedling

Radiofrequency (RF) microneedling combines the collagen-stimulating mechanism of traditional microneedling with radiofrequency energy delivered through the needle tips directly into the dermis. The RF energy creates thermal zones of injury deep in the dermis, producing more intense collagen remodeling than microneedling alone. This makes RF microneedling particularly effective for deeper atrophic scars, more significant skin textural changes, and patients seeking stronger collagen stimulation with a more favorable skin tone safety profile than ablative laser.

Non-Ablative Fractional Laser Resurfacing

Non-ablative fractional laser devices deliver columns of laser energy into the dermis, creating microscopic zones of thermal injury while leaving surrounding tissue intact. This fractional approach stimulates collagen remodeling within treated zones while surrounding untreated skin accelerates healing. Non-ablative fractional lasers are effective for atrophic acne scars and surgical or traumatic scars, requiring approximately 3 to 5 days of redness and mild swelling. They are appropriate for a broader range of skin tones than ablative lasers, though parameters must be adjusted for darker complexions.

Ablative Fractional Laser Resurfacing (CO2 and Erbium)

Ablative fractional lasers (CO2 and erbium) remove the surface layer of skin within each treated column while simultaneously heating the surrounding dermis to stimulate deeper collagen remodeling. Ablative fractional resurfacing produces the most significant collagen remodeling and the greatest improvement in scar depth and texture of any resurfacing modality. It requires the most downtime (typically 5 to 10 days) and carries the highest risk of post-inflammatory pigmentation changes in darker skin tones. It is best suited for patients with fair to medium skin tones, significant atrophic scarring, and the ability to commit to the required recovery period and sun avoidance.

Chemical Peels

Chemical peels can improve surface texture, post-inflammatory pigmentation, and mild to moderate atrophic scarring when used as part of a broader combination plan. TCA peels at appropriate concentrations complement laser or microneedling programs for acne scarring. For icepick scars specifically, focal TCA CROSS (Chemical Reconstruction of Skin Scars) applies a high-concentration TCA solution precisely into the base of each icepick scar to trigger collagen formation at the deepest point of the scar.

Combination Plans

Combination approaches consistently produce superior results for significant scarring compared to any single treatment in isolation. A typical plan for acne scarring might include a series of RF microneedling sessions alongside TCA CROSS for icepick scars, followed by non-ablative fractional laser for broader textural refinement. Topical retinoids and medical-grade skincare support collagen production between sessions and help manage post-inflammatory pigmentation.

Quick Comparison Table

Timeline And Expectations: How Long Treatment Takes

When treating scarring with microneedling or resurfacing, the most common question is: how much improvement can I realistically expect, and how long will it take? Setting accurate expectations requires understanding that scar remodeling is a gradual process driven by new collagen synthesis, and that improvement continues for months after each treatment session.

Weeks 1 to 4: Following the first microneedling or resurfacing session, the skin completes its initial healing phase. Redness and mild swelling resolve and the skin returns to its baseline appearance. The remodeling process is underway beneath the surface, but visible improvement from a single session is typically modest at this early stage.

Months 1 to 3: With continued sessions every 4 to 6 weeks, progressive collagen remodeling becomes increasingly visible. Scar depressions appear shallower, the skin surface looks smoother, and post-inflammatory pigmentation begins to fade. Most patients notice meaningful improvement after 2 to 3 treatment sessions.

Months 3 to 6: For patients completing a planned series of 3 to 6 sessions, the cumulative effect of collagen remodeling becomes clearly evident. Scars are visibly less deep, smoother in texture, and more consistent with the surrounding skin in color and tone.

Months 6 to 12+: The full extent of results from a completed treatment series continues to develop as long-term collagen remodeling progresses. Additional treatment sessions may be planned to further refine results for areas with more significant or stubborn scars.

Preventing New Scars and Maintaining Your Results

While treatment can produce meaningful improvement in existing scars, protecting your results and reducing the risk of new scarring is equally important. Here are key steps to support your skin:

• Treat active acne consistently and promptly to minimize new inflammatory lesions that could produce additional scarring
• Avoid picking, squeezing, or manipulating active acne lesions at all times
• Apply broad-spectrum SPF 30 or higher daily to protect treated skin from UV exposure, which can darken post-inflammatory pigmentation and slow visible improvement in scar color
• Use a prescription retinoid as directed between treatment sessions to support ongoing collagen production and improve skin cell turnover
• Follow your dermatologist’s post-treatment care instructions carefully after each session, particularly regarding sun avoidance and barrier protection
• Return for scheduled follow-up treatments as recommended to maintain and build on your results over time

How Connolly Dermatology Helps With Treating Scarring Requiring Microneedling or Resurfacing

At Connolly Dermatology, we take a clinical, comprehensive approach to scar treatment. We do not guess. We begin with a thorough evaluation of your scar types, depth, skin tone, and treatment history before recommending any procedure. Once we have a complete picture, our team will build a personalized treatment plan that selects the right combination of microneedling, resurfacing, and supportive skincare to deliver the safest, most effective improvement for your specific scars.

If you are ready to take the first step toward smoother, more even skin, we are here to guide you. Book an appointment with Connolly Dermatology today.