Microneedling and Acne Scars: What the Research Shows
Acne scars affect an estimated 95% of people who have had moderate to severe acne. They can persist for years — even decades — long after acne itself has resolved. Among the various treatment options for acne scars, microneedling has emerged as one of the most evidence-based, effective, and skin-type-safe approaches available today. At Mediversity in Turnersville, NJ, microneedling is one of our most requested aesthetic treatments.
Why Acne Scars Form
When a pimple or cyst damages the deeper layers of skin (the dermis), the body attempts to repair the damage by producing collagen. This repair process is often imperfect — it can produce too little collagen (creating a depressed, atrophic scar — the most common type) or too much (creating raised hypertrophic or keloid scars).
Types of atrophic acne scars include:
- Ice pick scars: Narrow, deep pits (the most difficult to treat)
- Boxcar scars: Broad, rectangular depressions with defined edges
- Rolling scars: Undulating, wavy depressions (the most responsive to microneedling)
How Microneedling Treats Acne Scars
Microneedling creates controlled micro-injuries in the skin using a device with very fine needles. These micro-injuries:
- Trigger the body’s wound healing cascade, stimulating new collagen and elastin production
- Break down fibrotic scar tissue that anchors depressed scars to deeper structures
- Remodel the dermis over time, filling in depressed scars from below
- Improve overall skin texture and tone in addition to addressing scars
The key mechanism is collagen induction therapy — stimulating the skin to produce the collagen that fills in depressed scar tissue. Unlike resurfacing treatments that remove the top layer of skin, microneedling works from the inside out.
What Results Can You Expect?
Clinical studies consistently show that microneedling produces significant improvement in acne scar appearance — with average improvement ratings of 50–75% in clinical trials across multiple sessions. Realistic expectations:
- Rolling scars respond best — often showing 60–80% improvement with a proper series
- Boxcar scars improve significantly, especially shallower ones
- Ice pick scars improve less with microneedling alone; combination treatments (TCA cross, laser) may be needed for these
The skin progressively improves over months as new collagen builds and remodels — results are not immediate but are meaningful and lasting.
How Many Sessions Are Needed?
For acne scarring, most patients need:
- Minimum series: 3 sessions (spaced 4–6 weeks apart)
- Optimal series: 4–6 sessions for moderate to severe scarring
- Maintenance: 1–2 sessions annually to maintain and continue improving results
Results build progressively — the improvement after session 4 is greater than after session 2. Patience and commitment to the full series produces the best outcome.
Microneedling vs. Other Acne Scar Treatments
- Microneedling vs. Laser (Fraxel): Both stimulate collagen. Lasers can be more aggressive with more downtime but faster results. Microneedling is safer for darker skin tones.
- Microneedling vs. Chemical Peels: Peels improve surface texture and pigmentation; microneedling works deeper for structural scar improvement. Best combined.
- Microneedling vs. Subcision: Subcision physically breaks the fibrotic bands anchoring rolling scars and can be done in conjunction with microneedling for enhanced results.
Is Microneedling Safe for All Skin Tones?
Yes — this is one of microneedling’s significant advantages over laser treatments. Because it does not target melanin or generate significant heat, microneedling is safe for all Fitzpatrick skin types, including darker complexions that carry higher risk with lasers and peels.
Book Your Microneedling Consultation in South Jersey
If acne scars are affecting your confidence, microneedling offers a proven, safe path to meaningful improvement. Learn more about microneedling at Mediversity or schedule your consultation at our Turnersville, NJ location.