Rolling, Boxcar or Ice-Pick Scars? How Doctors Classify Acne Scars Before Laser Treatment

TL;DR: Rolling, boxcar and ice-pick scars are three main types of atrophic acne scars, and they differ in shape, depth and how the scar is attached beneath the skin. Doctors classify the scar first because a treatment that suits a shallow boxcar scar may not adequately address a tethered rolling scar or a narrow, deep ice-pick scar.

If you are considering acne scar treatment in KL, identifying your scar type is an important first step. Most patients do not have just one uniform type of scar, so doctors assess the scar pattern, depth and underlying structure before deciding which treatment approach is appropriate.

What Are the Main Types of Acne Scars?

The three commonly recognised forms of depressed or atrophic acne scars are:

• Rolling scars – broad, shallow-looking depressions with a wave-like appearance

• Boxcar scars – round or oval depressions with more clearly defined edges

• Ice-pick scars – narrow, deep scars that extend vertically into the skin

This classification is widely used because the visible shape of the scar often reflects what is happening underneath the skin, which can affect treatment selection.

What Are Rolling Acne Scars?

Rolling scars are broad depressions that give the skin a wavy or undulating appearance. They commonly develop when fibrous tissue underneath the skin pulls or tethers the dermis downward.

Rather than having a sharp border, rolling scars tend to blend gradually into the surrounding skin.

How Rolling Scars Usually Look

Doctors may look for:

• broad, uneven depressions;

• soft or sloping edges;

• wave-like shadows under side lighting;

• scars that appear less obvious when the skin is stretched; and

• signs that the skin is tethered to deeper tissue.

Rolling scars are often several millimetres wide and can affect a larger area of the cheeks.

Why Rolling Scars Need a Different Treatment Approach

The key issue with many rolling scars is not simply the surface texture.

The scar may be anchored underneath the skin by fibrous bands.

This means that resurfacing the surface alone may not fully address the structural cause of the depression. Treatment planning may therefore need to consider whether the tethering itself should be released or otherwise addressed.

At Aglow Clinic, this is one reason acne scar assessment focuses on the underlying scar structure rather than automatically recommending the same procedure for every patient.

What Are Boxcar Acne Scars?

Boxcar scars are round or oval depressions with relatively clear, steep edges. They are wider at the surface than ice-pick scars and typically have a flat or broad base rather than narrowing into a deep point.

Their appearance is sometimes compared with a small crater or chickenpox-type scar.

How Boxcar Scars Usually Look

Doctors may assess:

• the width of each depression;

• whether the edges are sharply defined;

• whether the scar is shallow or deep;

• the number and distribution of scars; and

• how strongly the scars remain visible under different lighting.

The distinction between shallow and deep boxcar scars is especially important.

Why Scar Depth Matters for Boxcar Scars

Not every boxcar scar behaves the same way.

A shallow boxcar scar involves a more superficial depression, while deeper boxcar scars extend further into the dermis. Published reviews note that shallow boxcar scars may respond differently to resurfacing approaches than deeper scars, which can be more resistant to treatment limited to the upper skin layers.

Therefore, simply telling a doctor that you have “boxcar scars” is not always enough.

The doctor may also need to determine:

How deep are they? How wide are they? Are the edges sharply defined? Are other scar types present beside them?

What Are Ice-Pick Acne Scars?

Ice-pick scars are narrow, sharply defined and deeper than they are wide. They typically extend vertically into the deeper dermis and can sometimes reach even deeper tissue.

They often look like tiny holes or enlarged pores, but structurally they may be much deeper than they appear from the surface.

How Ice-Pick Scars Usually Look

Typical features include:

• a very small surface opening;

• narrow, sharply defined edges;

• a deep vertical tract;

• a V-shaped profile; and

• scars that remain clearly visible despite their small diameter.

Because the surface opening can be small, patients sometimes underestimate the depth of an ice-pick scar.

Why Ice-Pick Scars Are Treated Differently

The main challenge is depth.

A narrow scar extending deeply into the dermis may not respond in the same way as a wider, superficial depression. Reviews of acne scar treatment specifically note that deeper ice-pick scars can be relatively resistant to conventional surface resurfacing alone.

This is why doctors may consider a more targeted strategy for ice-pick scars rather than approaching them exactly like rolling or shallow boxcar scars.

Rolling vs Boxcar vs Ice-Pick Scars: What Is the Difference?

The easiest way to understand the three scar types is to compare their shape and underlying structure.

The important point is that two scars can both look depressed while having very different anatomy underneath.

That difference affects what a doctor is trying to correct.

Why Do Doctors Classify Acne Scars Before Treatment?

Doctors classify acne scars because treatment should match the scar’s structure rather than simply the diagnosis of “acne scarring.”

The original scar classification described by Jacob and colleagues was developed specifically to help clinicians identify scar subtypes more precisely and select appropriate treatment protocols.

During an acne scar assessment, a doctor may look at several factors.

1. Scar Shape

Is the depression:

• narrow and deep;

• broad with defined edges; or

• wide and gradually sloping?

Shape provides an initial clue to the scar subtype.

2. Scar Depth

A shallow depression is not treated exactly like a scar that extends deeply into the dermis.

Even within the same scar category, depth can influence the treatment plan.

3. Skin Tethering

Doctors may assess whether a scar is being pulled downward by fibrous tissue.

This is particularly relevant to rolling scars.

If tethering is present, simply treating the surface may not address the reason the scar remains depressed.

4. Scar Edges

Boxcar scars often have more defined vertical edges, while rolling scars have softer transitions into surrounding skin.

This difference can change how light creates shadows across the face and how the scar should be approached.

5. Number and Distribution of Scars

A patient may have:

• several isolated deep scars;

• many shallow scars;

• widespread rolling texture; or

• a combination of all three.

Treatment planning may therefore involve prioritising the scar types that contribute most to the visible unevenness.

Can You Have Rolling, Boxcar and Ice-Pick Scars at the Same Time?

Yes. Mixed acne scar patterns are common, and one person can have rolling, boxcar and ice-pick scars in different areas of the face. Clinical reviews note that different atrophic scar types frequently occur together and may sometimes be difficult to distinguish precisely.

For example, someone may have:

• rolling scars across the outer cheeks;

• several deeper boxcar scars near the temples; and

• isolated ice-pick scars closer to the centre of the cheeks.

This is why a single label such as “I have acne scars” does not give enough information to build a personalised treatment plan.

Why One Acne Scar Treatment May Not Suit Every Scar

Different scar types represent different structural problems, so a single treatment modality may not address every scar equally.

A rolling scar may involve tethering beneath the skin.

A shallow boxcar scar may mainly involve surface contour irregularity.

An ice-pick scar may extend deeply despite having only a tiny surface opening.

Those are three different treatment targets.

For patients researching Acne Scar Laser Treatment KL, the important takeaway is that the question should not simply be:

“Which laser is best for acne scars?”

A better starting question is:

“What type of acne scars do I have, and what is causing the depression?”

Only after the scar pattern has been assessed does it make sense to discuss whether laser resurfacing, another technique, or a combination approach is appropriate.

For a broader explanation of doctor-led laser options and treatment planning, see Aglow Clinic’s Acne Scar Laser Treatment KL guide.

Acne Scars vs Acne Marks: Are They the Same?

No. Acne scars involve structural changes in the skin, while post-acne marks mainly involve colour changes.

A flat brown, red or reddish-brown area left after a breakout may represent post-inflammatory pigmentation or erythema rather than an atrophic scar.

By contrast:

• rolling scars change the contour of the skin;

• boxcar scars create visible depressions; and

• ice-pick scars form narrow, deep pits.

A person can also have both pigmentation and true acne scars at the same time.

Distinguishing them matters because treating colour and correcting structural tissue loss are different objectives.

How Do Doctors Examine Acne Scars During Consultation?

A doctor typically examines acne scars directly under appropriate lighting and from different angles.

Assessment may include:

• looking at how shadows fall across the skin;

• examining the scars from the side rather than only from the front;

• checking whether scars flatten when the skin is stretched;

• assessing scar depth and width;

• checking for tethering;

• identifying active acne;

• distinguishing scars from pigmentation; and

• mapping which scar types are present in different facial areas.

Photographs can help with preliminary assessment and progress tracking, but an in-person examination often provides more information about scar depth, texture and tethering.

Why Scar Classification Matters at Aglow Clinic

At Aglow Clinic, acne scar treatment planning starts with identifying the scar pattern rather than assuming that every depressed acne scar should receive the same procedure.

For example:

Rolling scar → assess tethering.
The doctor considers whether deeper fibrous attachment is contributing to the depression.

Boxcar scar → assess depth and edges.
A shallow boxcar scar and a deep, sharply edged boxcar scar may require different strategies.

Ice-pick scar → assess depth and concentration.
A narrow but deep scar may need a more targeted approach than general surface texture treatment.

Patients with mixed scars may therefore require a personalised combination plan rather than one standard package.

This scar-first approach also supports Aglow Clinic’s broader Acne Scar Laser Treatment KL treatment philosophy: diagnose the scar structure first, then determine which treatment modalities are appropriate.

FAQ About Rolling, Boxcar and Ice-Pick Acne Scars

Which acne scar type is the deepest?

Ice-pick scars are typically the narrowest and deepest of the three major atrophic acne scar types. They can extend vertically into the deep dermis or even deeper tissue.

Which acne scars look wavy?

Rolling scars create a wavy or undulating skin surface. They are often associated with fibrous tethering between the dermis and deeper tissue.

How do I know whether I have boxcar scars?

Boxcar scars usually appear as round or oval depressions with relatively sharp, defined edges. A doctor can further determine whether they are shallow or deep.

Can I have more than one type of acne scar?

Yes. Many patients have a combination of rolling, boxcar and ice-pick scars, which is one reason personalised acne scar assessment is important.

Why does my doctor need to identify the scar type before laser treatment?

Because different scar structures respond differently to treatment. Classification helps the doctor determine whether the main problem is surface irregularity, tissue depth, fibrous tethering or a combination of these factors.

Conclusion

In summary, rolling, boxcar and ice-pick scars are not simply different-looking versions of the same problem. Rolling scars often involve underlying tethering, boxcar scars vary significantly by depth, and ice-pick scars form narrow but deep tracts.

Correctly classifying these acne scars helps doctors decide what structure needs to be treated before deciding which procedure to use. If you are exploring Acne Scar Laser Treatment KL, a scar-type assessment should come before choosing a laser or treatment package.