Best Treatments for Ice-Pick, Boxcar and Rolling Acne Scars

Not all acne scars are the same. Two people may both say they have acne scars, yet one has narrow, deep pits and the other has broad, wavy depressions. These differences matter, because each scar type forms in a different way and responds best to a different kind of treatment. Choosing one popular device for every scar is one of the main reasons people feel disappointed after scar treatment.

This guide explains the three main types of atrophic acne scar, ice-pick, boxcar and rolling, and the treatments that dermatologists in Korea and elsewhere commonly use for each. It also explains why most people end up with a combination plan rather than a single procedure.

Identifying your scar types

• Ice-pick scars: narrow, deep scars, usually less than about 2 mm wide at the surface, that look like small punctures. They often extend deep into the dermis, which makes them hard to reach with surface treatments.
• Boxcar scars: round or oval depressions with sharp, well-defined edges and a relatively flat base. They can be shallow or deep and often look like chickenpox scars.
• Rolling scars: broad depressions with soft, sloping edges that give the skin a wavy, uneven appearance, especially in side lighting. They are caused by fibrous bands tethering the skin to deeper tissue.

Most people with acne scarring have a mixture of these types, often alongside enlarged pores and red or brown post-acne marks. A careful assessment under good lighting, sometimes with photographs from different angles, is the first step towards an effective plan.

Treating ice-pick scars

Because ice-pick scars are narrow and deep, broad resurfacing treatments often have limited effect on them. Focal treatments that target each scar individually are usually more effective.

• TCA CROSS: a high-concentration trichloroacetic acid is applied precisely into the base of each scar using a fine applicator. This triggers collagen remodelling from the bottom up. Several sessions spaced weeks apart are typically needed, and temporary darkening of the treated spots is common.
• Punch excision: a small punch tool removes the scar, and the skin is closed with a fine stitch, leaving a small linear scar that is often less noticeable.
• Punch grafting: occasionally used for deeper scars, where a tiny piece of skin is used to fill the defect.

These focal treatments are often followed by fractional laser or RF microneedling to blend the surrounding texture.

Treating boxcar scars

Boxcar scars respond to treatments that remodel the dermis and soften their sharp edges. Depth is an important factor in choosing the method.

• Ablative fractional lasers such as CO2 or erbium can be very effective for shallow to moderate boxcar scars, with several days of downtime per session.
• RF microneedling such as Potenza or similar devices remodels the dermis with lower pigmentation risk, often suiting Asian and darker skin types.
• TCA CROSS or punch techniques may be used for deeper boxcar scars with steep walls.
• Collagen-stimulating injectables such as Juvelook or similar products are sometimes injected under scars to support gradual improvement.

Treating rolling scars

Rolling scars are caused by fibrous bands pulling the skin down, so the key step is releasing these bands.

• Subcision: a needle or blunt cannula is passed under the skin to cut or loosen the tethering bands. Bruising and swelling are common for one to two weeks, and several sessions may be needed.
• Fillers or boosters after subcision: hyaluronic acid filler or collagen-stimulating products can be placed to help prevent the bands from reattaching and to lift the depression.
• RF microneedling and fractional lasers: used alongside subcision to remodel the skin surface and improve texture.

Subcision is often considered one of the most important treatments for rolling scars, and it is frequently combined with energy devices over a programme of sessions.

Combining treatments for mixed scarring

Because most people have more than one scar type, combination therapy is common. A typical programme might start with subcision for rolling scars and TCA CROSS for ice-pick scars, followed by RF microneedling or fractional laser sessions every four to six weeks to improve overall texture. Skin boosters such as Rejuran S, which is marketed for scar-related use, or collagen stimulators may be added to support repair. The exact order and intervals depend on the doctor's approach and your skin's healing.

Some clinics perform several of these treatments on the same day, while others prefer to space them out. Both approaches can be reasonable, and it is worth asking why a particular sequence has been chosen.

Realistic expectations and risks

Acne scars can usually be improved, often substantially, but complete removal is rare. Improvement is commonly gradual over several months and multiple sessions. Possible side effects include prolonged redness, post-inflammatory hyperpigmentation, bruising after subcision, and, rarely, infection or worsening of scarring. Active acne should be controlled first, and people who have recently taken isotretinoin, have a history of keloids or have recurrent cold sores should discuss these with their doctor before starting.

Planning scar treatment in Korea

Scar revision is usually a long-term programme, which can be difficult to complete during a single trip. Visitors often use their time in Korea for an assessment and the more intensive treatments, such as subcision or ablative laser, and then continue maintenance sessions at home. Schedule procedures with downtime at the start of your stay, protect your skin carefully from the sun, and ask for written aftercare in English. Request a written plan that lists the techniques, devices and number of sessions recommended for your scar types.

Conclusion

Ice-pick, boxcar and rolling scars each have different structures, so they need different treatments. Ice-pick scars often respond best to focal methods such as TCA CROSS or punch techniques, boxcar scars to resurfacing and dermal remodelling, and rolling scars to subcision combined with energy treatments. Most people benefit from a tailored combination over time. An experienced dermatologist who identifies your scar types accurately is the most important part of a successful plan.

This article is for general information only and is not a substitute for a medical consultation. Suitability, results and recovery vary from person to person.