Standing at the bathroom mirror in side lighting is when most people first notice the texture. The breakouts themselves cleared up months or years ago, yet the surface of the skin holds a record of them in shallow dips, sharp pits, and soft undulations. Scars behave differently from active spots, and no cream applied at home is going to lift a depression that sits in the deeper layers of the skin.

That is where clinic-based options come in, though the choice can feel overwhelming once you start reading about them. Laser, subcision, and microneedling all appear in the same conversation, all promise smoother skin, and all sound broadly similar to someone who has not compared them closely. They work through quite different mechanisms, and effective acne scar treatment usually depends on matching the method to the specific scar shape sitting on your face.

Start by identifying the scar type

Dermatologists classify atrophic acne scars into three broad shapes, and the classification has guided treatment planning for decades¹. Getting this right is the single most useful thing that happens at a consultation, because every acne scar treatment decision downstream depends on it.

• Icepick scars are narrow and deep, often looking like a small puncture. Their depth makes them difficult to improve.
• Boxcar scars have wider, well-defined sharp edges and a flat base, similar to a shallow crater.
• Rolling scars have soft, sloping edges that give the skin a wavy appearance under angled light. They are usually caused by fibrous bands tethering the skin downwards.

Raised scars are a separate category with a separate approach, and treating them like a depressed scar tends to make them thicker. Pigmented marks left behind after a spot are also commonly mistaken for scarring, when they are flat discolouration or post-inflammatory hyperpigmentation that often fades over months with sun protection.

Subcision: Releasing the tether

Subcision was described in the 1990s as a way of freeing depressed scars from the bands pulling them down². A needle or blunt cannula is passed under the scar through a small entry point, and the fibrous strands anchoring the surface to deeper tissue are cut. Once the tether releases, the skin can sit closer to the surrounding level, and the small amount of controlled bleeding underneath encourages new collagen to form in the space.

This is the approach most often chosen for rolling scars and for tethered boxcar scars, since neither responds well to surface treatment alone. Expect bruising and swelling for several days afterwards. Because the underlying anchor is being addressed instead of the skin surface, subcision does relatively little for pitted icepick scars.

Laser resurfacing: Reworking the surface

Lasers used for scarring generally fall into ablative and non-ablative fractional categories. Ablative devices remove microscopic columns of tissue and prompt the skin to rebuild them, which tends to produce more noticeable change along with longer recovery. Non-ablative fractional devices heat similar columns without removing the surface, so downtime is shorter, and several sessions are usually planned.

A systematic review of energy-based scar treatments found supportive evidence across both categories while noting substantial variation in protocols, session numbers, and reported outcomes³. Practically, this means the settings and the number of sessions carry more influence than the brand name of the machine.

Laser work also carries a specific consideration for skin that tans easily. Deeper thermal injury can trigger post-inflammatory darkening in medium to deep skin tones, so conservative settings and careful sun avoidance afterwards are part of the plan for many patients in Singapore.

Microneedling: Controlled injury at a chosen depth

Microneedling creates hundreds of tiny channels in the skin with fine needles, triggering a wound-healing response that lays down new collagen without removing the surface layer. A randomised trial of a needling device for atrophic acne scars reported measurable improvement in scar appearance compared with untreated control areas⁴, and reviews have described it as a reasonably tolerable option across a wide range of skin tones⁵.

Depth is the whole story here, and it explains why at-home rollers sit in a different category altogether. Clinic needling reaches the dermis under sterile conditions with depth adjusted region by region, which is precisely why at-home microneedling isn’t like in-clinic treatments in either results or safety profile. Shallow home devices mostly affect the epidermis, and unsterile ones introduce infection risk on skin that is already compromised.

Radiofrequency microneedling adds heat delivered through insulated needle tips, which allows collagen stimulation at depth with less impact on the skin surface.

How the three compare

Why one method is rarely enough

Most faces carry a mixture of scar shapes, which is the practical reason dermatologists combine approaches instead of committing to one device. A common sequence begins with subcision to release the tethered areas, followed by fractional laser or needling several weeks later to refine the surface, with punch excision reserved for isolated icepick scars that will not respond to anything else. Fillers or biostimulatory injectables sometimes help to lift stubborn depressions.

Sequencing and spacing require judgement. Stacking energy-based treatments too closely together raises the risk of prolonged redness and pigment change without adding benefit, so a plan spread across months generally serves the skin better than an intensive block of sessions.

Settle the active acne first

Treating scars while spots are still forming creates a moving target, because fresh inflammatory lesions can leave fresh scars. Getting the acne itself under control comes first, whether through topical preparations such as those described by HealthHub or through oral treatment prescribed by a doctor. Patients who have recently taken oral isotretinoin also need a discussion about timing before any resurfacing procedure.

Sun protection runs alongside all of it, since healing skin is vulnerable to ultraviolet exposure and Singapore delivers plenty of that year round.

Conclusion

Scars respond to precision, and precision starts with an accurate assessment of what is on your skin. At Angeline Yong Dermatology, Dr Angeline Yong evaluates scar type, depth, and skin tone before recommending any single procedure or combination, with surgical and non-surgical options available at the clinic. Book a consultation to talk through a realistic plan and timeline for your skin.

References

Jacob, C. I., Dover, J. S., & Kaminer, M. S. (2001). Acne scarring: a classification system and review of treatment options. Journal of the American Academy of Dermatology, 45(1), 109–117. https://doi.org/10.1067/mjd.2001.113451

Orentreich, D. S., & Orentreich, N. (1995). Subcutaneous incisionless (subcision) surgery for the correction of depressed scars and wrinkles. Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.], 21(6), 543–549. https://doi.org/10.1111/j.1524-4725.1995.tb00259.x

Kravvas, G., & Al-Niaimi, F. (2018). A systematic review of treatments for acne scarring. Part 2: Energy-based techniques. Scars, burns & healing, 4, 2059513118793420. https://doi.org/10.1177/2059513118793420

Alam, M., Han, S., Pongprutthipan, M., Disphanurat, W., Kakar, R., Nodzenski, M., Pace, N., Kim, N., Yoo, S., Veledar, E., Poon, E., & West, D. P. (2014). Efficacy of a needling device for the treatment of acne scars: a randomized clinical trial. JAMA dermatology, 150(8), 844–849. https://doi.org/10.1001/jamadermatol.2013.8687

Alster, T. S., & Graham, P. M. (2018). Microneedling: A Review and Practical Guide. Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.], 44(3), 397–404. https://doi.org/10.1097/DSS.0000000000001248