Acne scars are not all the same, and that matters more than most blog posts on this topic will tell you. The type of scarring you have — its depth, shape, and how your skin formed it — determines whether microneedling is a strong option, a partial solution, or the wrong starting point entirely. Here’s a detailed, honest breakdown of what microneedling can do for acne scars and where its limits are.
The Scar Types That Matter for Treatment Planning
Acne scars fall into a few distinct categories, and each one responds differently to treatment. Understanding which type you’re dealing with is the single most important factor in predicting your results.
Rolling scars are broad, shallow depressions with smooth, sloping edges that give the skin a wave-like or undulating appearance. They’re caused by fibrous bands tethering the skin’s surface to deeper tissue. These are generally the most responsive to microneedling because the collagen remodeling process can fill in the shallow depressions and release some of the tethering over a series of treatments.
Boxcar scars are wider depressions with sharply defined vertical edges — they look like someone pressed a small cookie cutter into the skin. Shallow boxcar scars (under 0.5mm deep) respond well to microneedling. Deeper boxcar scars improve but may not fully resolve with microneedling alone.
Ice pick scars are narrow, deep, V-shaped pits that extend into the dermis or even subcutaneous tissue. These are the most difficult acne scars to treat with any modality, and microneedling is no exception. The micro-channels created by needling are too wide relative to the narrow scar tract to produce significant remodeling at that depth. Ice pick scars typically need combination approaches — TCA CROSS (a targeted chemical application), punch excision, or subcision before microneedling can meaningfully improve the surrounding texture.
Hypertrophic and keloid scars are raised scars caused by an overproduction of collagen during healing. This is an important distinction: microneedling works by stimulating new collagen production, which is exactly what you don’t want in a scar that already has too much. Patients with a history of keloid scarring are generally not candidates for microneedling on or near those areas. Hypertrophic scars (which stay within the boundary of the original wound, unlike keloids) may be treated cautiously in some cases, but this requires careful assessment.
What Microneedling Actually Does to Scar Tissue
A common misconception is that microneedling “removes” scars. It doesn’t. The scar tissue is still there after treatment — what changes is how that tissue is organized.
When the needles create controlled micro-injuries at depths of 1.0–2.5mm, the body’s wound-healing response kicks in. Over the following weeks and months, new collagen fibers are laid down in a more organized pattern than the original scar tissue. The result is a gradual smoothing and filling of depressed scars as the new collagen matrix replaces some of the disordered scar collagen. This process is called collagen remodeling, and it continues for three to six months after each session.
The key word is “improve,” not “eliminate.” Published studies on microneedling for atrophic acne scars generally show improvement in the range of 30–70%, depending on scar type, depth, and the number of treatment sessions. Rolling scars tend to land on the higher end of that range. Deep ice pick scars tend to land well below it.
How Many Sessions by Scar Severity
Mild scarring — shallow rolling or boxcar scars with minor textural irregularity — typically shows meaningful improvement in three to four sessions spaced four to six weeks apart. Some patients are satisfied after three sessions; others prefer to continue for additional refinement.
Moderate scarring — a mix of scar types at varying depths, or more pronounced rolling and boxcar scars — usually requires four to six sessions. This is where patience matters most, because the cumulative nature of collagen remodeling means the difference between session three and session six can be significant.
Severe scarring — deep boxcar scars, ice pick scars, or widespread scarring across multiple facial zones — often needs six or more sessions, and frankly, microneedling alone may not be the right primary treatment. For severe scarring, we typically recommend a combination approach where microneedling treatments are part of a broader plan that may include subcision, laser resurfacing, or chemical peels targeting specific scar types.
For a broader look at session planning and how results build over time, our post on how many microneedling sessions to expect goes into more detail.
RF Microneedling vs. Standard Microneedling for Scarring
Standard microneedling and RF microneedling are related but different procedures, and for acne scars specifically, the distinction matters.
Standard microneedling creates collagen remodeling through controlled mechanical injury alone. RF (radiofrequency) microneedling adds thermal energy delivered through the needles into the deeper dermis. The heat causes additional tissue contraction and stimulates collagen production at depths that mechanical needling alone doesn’t reach as effectively.
For acne scarring — particularly moderate to deep boxcar scars and scars with a tethered or fibrotic component — RF microneedling tends to produce more significant improvement per session. The thermal energy helps break up the fibrotic tissue beneath the scar more aggressively than standard needling. That said, RF microneedling starts at $550 per session compared to $350 for standard microneedling, so the cost difference is a practical consideration when planning a multi-session treatment course.
The right choice depends on scar depth and type. Shallow rolling scars may do perfectly well with standard microneedling. Deeper, more fibrotic scarring generally gets more out of the RF option.
Can Microneedling Cause New Scars?
This is the question behind the original title of this post, and it deserves a direct answer: when performed correctly by a trained professional using appropriate needle depths, microneedling has a very low risk of causing new scarring. The micro-channels created by professional devices close within hours, and the controlled nature of the injury is fundamentally different from the uncontrolled inflammation that causes acne scars in the first place.
That said, risk is not zero. Scarring from microneedling can occur if the treatment is performed too aggressively (excessive depth or too many passes over the same area), if the patient has an active skin infection during treatment, or if the patient has a predisposition to keloid or hypertrophic scarring that wasn’t identified beforehand. Improper aftercare — particularly sun exposure during the healing window or applying irritating products too soon — can also lead to post-inflammatory hyperpigmentation, which isn’t scarring but is an unwelcome outcome.
This is one of the reasons provider selection matters. At-home derma rollers operating at 0.25mm depth are a completely different mechanism of action from professional devices operating at 1.0–2.5mm. They’re also far less likely to cause complications — but they’re also far less effective for actual scar remodeling. The depths needed to meaningfully affect scar tissue require professional equipment and clinical judgment about how deep to go and where.
What Microneedling Won’t Do for Acne Scars
Being upfront about limitations is important, because unrealistic expectations are the fastest path to dissatisfaction with any cosmetic procedure.
Microneedling will not make acne scars disappear completely. Even with an optimal series of treatments, most patients achieve a noticeable improvement — not a total erasure. If someone promises you “scar-free” skin from microneedling, that’s a red flag about their clinical honesty.
Microneedling will not effectively treat deep ice pick scars as a standalone treatment. These scars need targeted interventions first, after which microneedling can help refine the overall texture.
Microneedling results are not immediate. You’ll see some improvement in skin texture within a few weeks of your first session, but the bulk of collagen remodeling happens over months. Patients who expect to see their final result before completing their full series of treatments are often prematurely disappointed.
And microneedling does not stop aging or prevent new breakouts. If you’re still experiencing active acne, that needs to be controlled before starting microneedling — treating scars while new ones are actively forming is counterproductive. Our Atlanta acne scar treatment page covers the broader range of options we use for active acne alongside scarring.
Treatments That Pair Well With Microneedling for Acne Scars
For patients whose scarring involves multiple scar types or is more severe, a combination approach almost always produces better results than any single treatment.
Subcision is a minor procedure that uses a needle to release the fibrous bands pulling scar tissue downward. It’s particularly effective for tethered rolling scars and can dramatically improve the result when followed by microneedling sessions.
Chemical peels — particularly medium-depth peels — can address surface-level irregularity and pigmentation changes around scars. When used between microneedling sessions, they help refine texture at the epidermal level while microneedling works on deeper collagen remodeling.
Laser resurfacing targets scar edges and surface texture with precision. For patients with a mix of scar types, combining laser work for surface refinement with microneedling for deeper collagen remodeling can produce results that neither treatment achieves on its own.
Hyperpigmentation treatments are often needed alongside scar work, because acne scars and post-inflammatory hyperpigmentation frequently coexist. Addressing both concerns simultaneously leads to a more complete improvement in overall skin appearance.
Setting Realistic Expectations
The patients who are most satisfied with microneedling for acne scars are the ones who walk in with accurate expectations. If you’re dealing with mild to moderate rolling or boxcar scars, three to six sessions of professional microneedling can meaningfully improve your skin’s texture and the visibility of those scars. The improvement is real, it’s lasting (though maintenance sessions every 12–18 months help preserve it), and it comes with minimal downtime compared to more aggressive resurfacing procedures.
For more complex scarring, a consultation is the right starting point. We’ll assess your specific scar types, discuss what combination of treatments makes sense, and give you an honest projection of what’s achievable. For Sandy Springs and Atlanta-area patients, that conversation is complimentary and comes with no obligation.
For a full overview of what recovery looks like and how to care for your skin after treatment, see our post on microneedling side effects, aftercare, and what to expect.
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ELLEMES Medical Spa is located at 5505 Peachtree Dunwoody Road in Sandy Springs, GA — serving patients from Buckhead, Brookhaven, Dunwoody, and greater Atlanta.