Types of Acne Scars include atrophic scars like ice pick, boxcar, and rolling scars, which make up 80-90% of cases, and hypertrophic or keloid scars that are raised. Atrophic scars result from tissue loss, while hypertrophic scars come from excess collagen. Treatment varies by type, with lasers and microneedling effective for atrophic scars.
Types of Acne Scars
Ice Pick Scars
Ice pick scars are narrow, deep pits that look like the skin was punctured with a tiny ice pick. They’re wide at the surface and taper to a point deep in the dermis. You’ll see them most on the cheeks and forehead where skin is thin. They form after severe cystic acne and are tough to treat because they extend past what surface products can reach.
Boxcar Scars
Boxcar scars are broad, round or oval depressions with sharp, vertical edges. Think “U-shaped” like chickenpox scars. They show up on the lower cheeks and jaw where skin is thicker. Widespread inflammatory acne or chickenpox causes them. Depth varies, but the sharp edges create shadows that make them noticeable.
Rolling Scars
Rolling scars create a wavy, uneven texture with soft, sloping edges. The skin looks like gentle hills and valleys, not sharp pits. They’re called “W-shaped” scars. Fibrous bands under the skin tether the surface down. They’re common on the lower cheeks and jawline, especially in men with long-term inflammatory acne. They get more obvious with age as skin loses tightness.
Hypertrophic Scars
Hypertrophic scars are firm, raised scars that stay within the boundary of the original pimple. They feel thick and rubbery. You’ll find them on the chest, back, shoulders, and jawline. They happen when your body makes too much collagen during healing. Unlike keloids, they don’t grow beyond the wound area.
Keloid Scars
Keloid scars are raised, often darker bumps that grow beyond the original acne spot. They can feel itchy, tender, or painful. Keloids extend past the wound and can keep growing over time. They’re linked to genetics and are more common in darker skin tones. Common spots are the chest, back, shoulders, and earlobes.
Best Acne Scar Treatments in Malaysia
Subcision
Subcision uses a needle inserted under the skin to break fibrous bands that pull rolling scars down. Once released, the skin lifts and new collagen fills the space. It works best for rolling scars. Expect bruising for 1-2 weeks. It’s often combined with filler or microneedling for better results.
Fractional CO2 Laser
Fractional CO2 laser is an ablative laser that removes columns of skin and heats the dermis to trigger major collagen remodeling. It treats boxcar, rolling, and some ice pick scars. Downtime is 5-10 days of redness, peeling, and swelling. It delivers strong results but has higher risk of PIH in darker skin tones, so settings must be adjusted.
Microneedling
Microneedling creates tiny controlled injuries with fine needles to stimulate collagen and elastin. It improves shallow boxcar and rolling scars and overall texture. There’s 1-3 days of redness. You need 3-6 sessions spaced 4-6 weeks apart. It’s safe for all skin tones because it doesn’t use heat.
Radiofrequency Microneedling
Radiofrequency microneedling adds heat energy to standard microneedling. The needles deliver RF deep into the dermis, tightening tissue and boosting collagen more than microneedling alone. It’s effective for rolling and boxcar scars and mild skin laxity. Downtime is 2-4 days. It’s safer than ablative lasers for melanin-rich skin.
TCA CROSS
TCA CROSS stands for Trichloroacetic Acid Chemical Reconstruction of Skin Scars. A high-strength TCA peel is placed directly inside ice pick scars with a toothpick. It causes controlled injury so the scar floor rises over time. It’s the gold standard for ice pick scars. Expect scabbing for 5-7 days. You’ll need 2-4 sessions spaced 6-8 weeks apart.
Chemical Peels
Chemical peels use acids like glycolic, salicylic, or lower-strength TCA to exfoliate the top layers of skin. Medium and deep peels help with shallow boxcar scars, PIH, and skin texture. They won’t fix deep ice pick or tethered rolling scars. Downtime ranges from none to 7 days depending on strength. Peels must be chosen carefully for darker skin to avoid PIH.
Dermal Fillers
Dermal fillers like hyaluronic acid or Bellafill are injected under depressed scars to raise them to the level of surrounding skin. They work instantly on rolling and boxcar scars. HA fillers last 6-18 months. Bellafill is semipermanent. Fillers don’t treat the scar itself, so they’re best combined with collagen-stimulating treatments.
Combination Treatments
No single treatment fixes all scar types. Dermatologists combine methods for 40-70% overall improvement. Common combos: subcision + filler for rolling scars, TCA CROSS + fractional laser for ice pick and boxcar scars, microneedling + chemical peel for texture and PIH. Plans are customized because most people have mixed scar types.
Bottom Line on Types of Acne Scars
You have to match the scar type to the right tool. Ice pick scars need TCA CROSS or punch excision. Rolling scars need subcision to release tethers. Boxcar scars respond to microneedling, lasers, and fillers. Hypertrophic and keloid scars need steroid injections or silicone. Start by controlling active acne, use sunscreen daily, and accept that real collagen change takes 6-12 months and multiple sessions.
FAQs About Types of Acne Scars
Which type of acne scar is the hardest to treat?
Ice pick scars are the hardest because they’re narrow and deep, extending into the dermis. Topical products can’t reach them. They usually need TCA CROSS or punch excision, and even then require multiple sessions.
Can acne scars be removed permanently?
True atrophic and hypertrophic scars can’t be 100% erased, but they can be improved 40-80% with the right treatments. Results are long-lasting if collagen is rebuilt. Fillers are temporary unless you use Bellafill. Maintenance may be needed as skin ages.
What is the best treatment for ice pick scars?
TCA CROSS is the first-line treatment. A 70-100% TCA acid is applied inside the scar to raise the floor over several sessions. For very deep scars, punch excision to cut out and stitch the scar is used. Fractional laser is added for surrounding texture.
How many acne scar treatment sessions are needed?
Most plans need 3-6 sessions. Microneedling: 3-6 sessions. Fractional CO2 laser: 1-3 sessions. TCA CROSS: 2-4 sessions. Subcision: 1-3 sessions. Sessions are spaced 4-8 weeks apart because you’re waiting for new collagen to form.
Which acne scar treatment has the shortest downtime?
Microneedling and light chemical peels have the shortest downtime, usually 1-3 days of redness. Subcision and RF microneedling need 2-7 days. Fractional CO2 laser has the longest at 5-10 days. Dermal fillers have almost no downtime except possible bruising.
