Depressed Acne Scars: Ice Pick, Boxcar and Rolling Scars, and What Treats Each

Depressed acne scars, also called atrophic scars, are the dents and pits left behind when deep breakouts destroy collagen faster than the skin can rebuild it. They make up the large majority of acne scars, and they come in three main shapes: ice pick, boxcar and rolling. The shape matters, because each type responds to different treatments, and most people have a mix of all three.

Depressed scars do not disappear with creams alone, but the right combination of treatments can make them much less noticeable. This guide explains how to tell the types apart, which treatments work for each, what results are realistic and what treatment costs at Glow Theory.

Why depressed scars form

A deep, inflamed breakout damages the skin around the pore. As it heals, the body does not replace all the lost collagen, so the surface sinks. In some scars, bands of fibrous tissue form underneath and tether the skin down, which creates a rolling, wavy look. The more inflamed the acne, and the longer it lasts, the higher the risk. Picking and squeezing spots adds to the damage.

Depressed scars are different from the flat red or brown marks many people call “scars.” Those marks (post-inflammatory redness and hyperpigmentation) are not indented and usually fade over months with sun protection and skincare.

The three types of depressed acne scars

Type	What it looks like	Treatments that work best
Ice pick	Narrow (under 2 mm), deep pits, like a large open pore	TCA CROSS (a strong acid placed in the scar), punch excision; lasers alone do little
Boxcar	Wider, round or oval dents with sharp edges, like a chickenpox scar	Shallow: laser resurfacing, RF microneedling, peels. Deep: punch elevation, TCA CROSS, filler
Rolling	Broad, shallow dips with soft edges that make skin look wavy, worse in side lighting	Subcision to release the tethering bands, then RF microneedling, lasers or filler

A simple test: stretch the skin gently. Rolling and shallow boxcar scars soften when stretched; ice pick and deep boxcar scars stay visible.

Treatment options for depressed acne scars

Subcision

A fine needle is passed under the scar to cut the fibrous bands pulling it down. The skin lifts, and the controlled injury prompts new collagen. It is the treatment of choice for rolling scars and helps many boxcar scars, but not ice pick scars. It is done under local numbing; bruising for a week or so is common. Most people need 1 to 2 sessions. See acne subcision in Carlsbad.

RF microneedling (Morpheus8)

Fine needles deliver radiofrequency heat below the surface to remodel collagen. It improves rolling and shallow boxcar scars and overall texture, and the American Academy of Dermatology describes RF microneedling as safe for all skin tones. Plan on 3 to 4 sessions about 4 to 6 weeks apart, with results building over 3 months after the last one. Read what Morpheus8 is.

Laser resurfacing

Fractional lasers remove or heat tiny columns of skin to smooth the edges of boxcar scars and improve texture. HALO is a gentler hybrid laser with 1 to 2 days of downtime, best for mild scarring and texture on lighter to medium skin. Erbium laser resurfacing goes deeper for more significant scarring, with about 10 to 15 days of downtime. Ablative lasers carry a higher risk of dark or light patches on darker skin, so your skin type guides the choice; see our Fitzpatrick skin type guide.

TCA CROSS and punch techniques

For ice pick and deep, narrow boxcar scars, a high-strength trichloroacetic acid (TCA) is applied precisely into each scar to rebuild collagen from the base, usually over several sessions. Punch excision removes a deep scar and closes it with a stitch; punch elevation lifts a boxcar scar’s floor to the surface.

Fillers and collagen stimulators

Filler can lift soft rolling and boxcar scars right away. A PMMA filler (Bellafill) is FDA-approved for moderate to severe acne scars on the cheeks; hyaluronic acid fillers and Sculptra are also used and gradually wear off. Fillers work best after subcision has released the scar.

Chemical peels

Medium-depth chemical peels improve mild scarring, texture and the dark marks that often sit alongside scars. They are a supporting treatment rather than a fix for deep scars.

A typical treatment plan

1. Control active acne with skincare or prescription treatment, and keep it controlled.
2. Map your scars at a consultation that includes a VISIA skin analysis, so each scar type gets the right tool.
3. Release and lift rolling scars with subcision, and treat ice pick scars with targeted techniques.
4. Resurface and remodel with a series of Morpheus8 sessions or laser resurfacing.
5. Fill what remains with filler if needed, and keep up sunscreen and a retinoid at home.

Collagen remodeling is slow: most improvement shows 3 to 6 months after a series, and it can keep improving for up to a year. Honest expectations matter. Experts note that complete clearing of acne scars is the exception rather than the rule; the goal is scars that are clearly softer and less noticeable, especially in everyday lighting.

What treatment costs at Glow Theory

Subcision is priced by the number and severity of scars and confirmed at your consultation; the consultation fee is credited toward treatment or products booked the same day. Financing is available on treatments of $2,000 or more.

Can you prevent depressed acne scars?

• Treat acne early, especially deep, painful or cystic breakouts, which are the ones that scar.
• Do not pick or squeeze spots.
• Wear sunscreen daily so marks fade faster and scars do not darken.
• Use a retinoid to keep pores clear and support collagen; see our retinol guide.

Acne scar treatment in Carlsbad

Acne scars can affect confidence and how people feel about their skin, and treating them is a reasonable goal. Our dermatology team will look at your scar types and skin tone and build a step-by-step plan, from subcision and Morpheus8 to laser resurfacing. If you still have breakouts, start with our acne treatment. Book a consultation at our South Carlsbad studio on El Camino Real.