By Dr. Rajat Kandhari — MD Dermatology (Gold Medalist), MSc Non-Surgical Facial Aesthetics (Distinction, UK), Medical Director, Dr. Kandhari’s Skin Clinic, Greater Kailash Part-1, South Delhi
Most patients who come to our clinic in Greater Kailash Part-1 asking about acne scar treatment in South Delhi have already tried something. A CO2 laser elsewhere. A derma roller at home. A course of peels at a salon. In most cases, the problem is not that they tried the wrong treatment — it is that they tried the right treatment for the wrong type of scar. Acne scar removal is not a single treatment. It is a matching exercise: each scar type has a biological mechanism, and the treatments that work are the ones that address that specific mechanism directly.
The consequences of mismatching treatment to scar type are not trivial. Ablative laser used aggressively on ice pick scars that need TCA CROSS makes the scar wider without improving depth. Subcision used on boxcar scars with hard fibrotic bases — without adjunct treatment — produces improvement then regression as the skin re-adheres. Getting this right requires a clinical assessment of scar morphology, not a menu selection.
The Four Main Acne Scar Types — and What Makes Each Different
1.Ice Pick Scars
Ice pick scars are narrow, deep, sharply defined tracts that extend from the skin surface into the dermis — sometimes reaching the subcutaneous fat. They are the hardest acne scar type to treat because their depth-to-width ratio makes surface remodelling techniques ineffective. A CO2 laser can resurface the top layer, but it cannot reach the base of a 3–4mm tract. The treatment of choice for ice pick scars is TCA CROSS — trichloroacetic acid chemical reconstruction of skin scars.
TCA CROSS works by applying a high concentration of trichloroacetic acid precisely to the base of the ice pick tract using a fine applicator. This triggers a controlled inflammatory reaction that destroys the fibrotic tissue lining the scar walls, stimulates new collagen remodelling, and causes the walls of the tract to contract and close from the base upward. Results are visible after each session, with four to six sessions typically required for significant improvement.
2. Boxcar Scars
Boxcar scars are round or oval depressions with well-defined, vertical walls and a flat base — resembling the impression left by a chicken pox lesion. Shallow boxcar scars (under 0.5mm deep) respond well to CO2 fractional laser and MNRF (microneedling radiofrequency), which resurface the skin surface and stimulate collagen remodelling across the scar base and walls. Deeper boxcar scars often benefit from a combination approach — energy-based treatment plus HA fillers or PRP injected beneath the scar to lift the base while new collagen forms.
3. Rolling Scars
Rolling scars are the result of fibrous tethering — bands of scar tissue that anchor the base of the scar to the deeper tissue, pulling the skin surface downward and creating an undulating, wavelike appearance. Because the mechanism is a physical tether rather than a surface depression, surface remodelling alone does not resolve them. The primary treatment is subcision — a minimally invasive procedure in which a fine needle is inserted beneath the scar and moved in a fanning motion to sever the fibrous bands. Once the tethering is released, the depressed skin rises.
Subcision is usually combined with PRP or HA fillers injected immediately after to fill the space created and reduce re-adherence as healing occurs. Repeated sessions address scars progressively. MNRF is frequently added to the protocol to stimulate dermal matrix repair across the broader scar area.
4. Atrophic / Shallow Depressed Scars
Shallow atrophic scars — broad, gently depressed areas without sharp walls or fibrotic tethering — respond best to volume replacement and collagen remodelling. HA fillers injected subdermally lift the base immediately, while PRP and MNRF stimulate new collagen over the following weeks to months. For widespread shallow atrophic scarring across the cheeks, a combination of CO2 fractional laser and MNRF delivered in a phased protocol produces consistent improvement in texture and depth.
Why Most Patients Have More Than One Scar Type — and What That Means for Treatment
Clinical reality is that most patients presenting with acne scar removal concerns do not have a single scar type. A typical South Delhi patient might have ice pick scars across the cheeks, rolling scars along the jaw, and shallow boxcar scars on the temples — all requiring different primary treatments used simultaneously or in a defined sequence.
This is why the first step at our Greater Kailash clinic is always a structured scar mapping assessment. I examine each area of the face under focused lighting and categorise the scars present — their type, depth, distribution, and severity. The treatment plan that follows is a protocol, not a single procedure: TCA CROSS for ice picks at one session, subcision and PRP for rolling scars at the next, MNRF or CO2 across the broader surface at defined intervals. Attempting all of this in one session is counter-productive — overlapping treatments at the same site in one visit exceeds the skin’s healing capacity. The sequencing matters as much as the selection.
The Role of Each Treatment — What It Does and When It Is Used
TCA CROSS — Trichloroacetic Acid Chemical Reconstruction: Used specifically for ice pick scars and narrow deep boxcar scars. Applied with precision to scar bases. Four to six sessions at four-week intervals. Does not affect surrounding skin. See our TCA CROSS page for full details.
CO2 Fractional Laser: Ablative laser resurfacing that vaporises controlled columns of skin tissue, stimulating deep collagen remodelling and surface renewal. Best for moderate-depth boxcar and atrophic scars. Requires appropriate pre-treatment skin preparation, particularly for Fitzpatrick type IV–VI Indian skin to minimise pigmentation risk. See our CO2 Laser Scars page.
MNRF (Microneedling Radiofrequency): Delivers radiofrequency energy via insulated microneedles at controlled depths into the dermis, stimulating targeted collagen remodelling without damaging the skin surface. Highly suitable for Indian skin types — low risk of post-inflammatory hyperpigmentation. Used for boxcar scars, atrophic scars, and overall texture improvement. Details on our MNRF page.
Subcision: Minimally invasive procedure for rolling scars with fibrous tethering. Severs the bands holding the scar base to deeper tissue. Combined with PRP or filler for best outcomes. Multiple sessions usually required. See our Subcision page.
PRP (Platelet-Rich Plasma): Used as an adjunct to mechanical and energy-based treatments — injected subdermally to deliver concentrated growth factors that stimulate collagen remodelling and accelerate tissue repair. Enhances outcomes of subcision, CO2, and MNRF when combined in the same protocol. See our PRP Scars page.
HA Fillers (Hyaluronic Acid Fillers): Provide immediate volumetric lift beneath depressed scars, raising the scar base to the level of surrounding skin. Used for deep boxcar scars and rolling scars after subcision. Not a permanent solution but provides significant improvement while collagen remodelling treatments work over time. Details on our HA Fillers page.
The Importance of Treating Scars Early
first six to twelve months of formation. During this window, the collagen remodelling process is still active and the fibrous tissue has not fully hardened. CO2 laser, MNRF, and TCA CROSS all produce stronger results on recently formed scars than on mature, longstanding ones where the architecture has calcified over years.
If you are currently managing active acne and are noticing the first signs of scarring — early marks, small depressions, or textural changes — this is the right time to seek a south delhi dermatologist assessment, not later. A phased programme that manages active acne and begins scar treatment simultaneously is entirely feasible and produces the best long-term outcomes.
What to Expect: Sessions, Timelines, and Realistic Results
Most scar treatment programmes at our south delhi clinic run over three to six months, with sessions spaced three to six weeks apart depending on the treatment used. Early signs of improvement are typically visible after the second session. Significant improvement — meaningful reduction in scar depth, improved skin texture, reduction in the undulating appearance of rolling scars — is usually apparent at the four to six month mark with consistent treatment.
Results vary depending on scar type, depth, duration, and skin type. Longstanding, deep ice pick scars improve but rarely resolve completely. Rolling scars with good subcision response and adjunct PRP can achieve very significant improvement. Shallow atrophic scars treated with MNRF and CO2 show consistent texture improvement across the treated area. A realistic outcome discussion is part of every first consultation at our Greater Kailash clinic — so patients understand what the treatment programme can deliver and on what timeline.
For a scar assessment and personalised treatment plan, book a consultation at Dr. Rajat Kandhari’s clinic — S-79, Greater Kailash Part-1, South Delhi. Open Monday to Saturday, 9am to 8pm. Call or WhatsApp: +91 9315479193.
Frequently Asked Questions
Q1. What is the best treatment for acne scars on Indian skin?
It depends on scar type. TCA CROSS is best for ice pick scars. Subcision with PRP is the first-line treatment for rolling scars. CO2 fractional laser and MNRF are most effective for boxcar scars and general atrophic scarring. Most patients require a combination protocol. For Fitzpatrick type IV–VI Indian skin, MNRF is preferred over ablative laser for its lower pigmentation risk.
Q2. How many sessions of TCA CROSS are needed for ice pick scars?
Typically four to six sessions at four-week intervals. Results are cumulative — the scar narrows progressively with each session as collagen remodelling fills the tract from the base upward. Some very deep ice pick scars may require additional sessions.
Q3. Can acne scars be treated while I still have active acne?
Active acne should be stabilised before major scar procedures like CO2 laser or MNRF. However, TCA CROSS on established ice pick scars and early scar management with peels can begin while active acne is being treated medically. A phased approach is usually planned at the initial consultation.
Q4. Is CO2 laser safe for acne scars on darker Indian skin?
Yes, with appropriate technique and preparation. CO2 fractional laser carries a higher risk of post-inflammatory hyperpigmentation on Fitzpatrick type IV–VI skin than on lighter skin types, but this risk is significantly mitigated with proper pre-treatment priming, correct energy settings, and post-treatment care. Dr. Rajat Kandhari has specialist training in laser safety for Indian skin.
Q5. What is subcision and how many sessions are needed for rolling scars?
Subcision severs the fibrous bands tethering rolling scars to deeper tissue, releasing the skin surface and allowing it to rise. Most patients need three to five sessions, combined with PRP or HA fillers at each session, for significant improvement.
Q6. How long do acne scar treatment results last?
Structural improvements — raised scar bases, released tethering, filled depressions — are long-lasting. New collagen stimulated by CO2 laser, MNRF, and PRP continues to remodel for up to twelve months after treatment. HA filler results are temporary, typically lasting twelve to eighteen months, after which repeat treatment maintains the improvement. The underlying collagen remodelling improvements from laser and MNRF are permanent.
Q7. Where is the clinic located in South Delhi?
S-79, Greater Kailash Part-1, New Delhi 110048. Accessible from Greater Kailash, Hauz Khas, Defence Colony, Lajpat Nagar, Malviya Nagar, Saket, and Green Park — all within a 10 to 15 minute drive. Open Monday to Saturday, 9am to 8pm.