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Have you ever noticed that some acne scars look like tiny holes, while others appear as wider depressions or uneven patches on the cheeks? They may all be called acne scars, but they are not necessarily the same type of skin damage.

This difference is important because acne scar treatment is not a one-size-fits-all procedure. Dr. Geetika Srivastava, an AIIMS-trained MD Dermatologist with more than 10 years of dermatology experience, evaluates acne scars based on their shape, depth and the changes occurring beneath the skin. Identifying the scar type helps determine whether the skin needs resurfacing, collagen remodelling or a procedure that releases scar tissue.

The three common types of depressed acne scars are ice pick, boxcar and rolling scars. Although they may appear together, each responds differently to treatment.

Why Do Some Pimples Leave Scars While Others Heal Normally?

When acne causes inflammation deep within the skin, it can damage the surrounding tissue and collagen. Collagen provides structural support to the skin. During healing, if the skin does not replace enough of the damaged collagen, a depression may remain.

These depressed scars are medically known as atrophic acne scars. The appearance of the scar depends on how the tissue was damaged, how deeply the inflammation extended and how the skin healed afterwards. This explains why two people with similar acne may develop very different scars. Even on the same face, one area may have small, deep pits while another develops broader, uneven depressions.

It is also important to distinguish acne scars from acne marks. Brown or red marks left after pimples are usually changes in pigmentation or redness rather than actual depressions in the skin. Their treatment is different.

What Are the Three Main Types of Acne Scars?

Ice pick, boxcar and rolling scars are classified according to their shape and the way they affect the skin’s structure.

1. Ice Pick Scars: Small Openings That Extend Deep into the Skin

Ice pick scars look like tiny, sharply defined holes in the skin. They are usually narrow at the surface but extend deeper into the underlying tissue. Their appearance is often compared to a small puncture made by a sharp object.

These scars are commonly seen on the cheeks and may become more noticeable under direct or angled lighting.

How to recognise ice pick scars

• Small, narrow openings in the skin
• Deep, V-shaped depressions
• Clearly defined edges
• A pitted appearance that remains even when the skin is stretched

The main challenge with ice pick scars is their depth. Because the damage extends deeper than the visible opening, treatments that primarily improve the surface of the skin may not adequately correct them.

How Are Ice Pick Acne Scars Treated?

Treatment generally focuses on the individual scar rather than treating the entire skin surface in the same way.

TCA CROSS

TCA CROSS stands for Chemical Reconstruction of Skin Scars. During this procedure, a dermatologist carefully applies trichloroacetic acid to the individual scar. The controlled chemical injury stimulates a healing response and collagen remodelling within the depression.

It is commonly considered for narrow, deep ice pick scars. Several treatment sessions may be needed, and complete removal of the scar cannot be guaranteed.

Punch Excision

For selected deep scars, punch excision may be considered. The scar is surgically removed using a small specialised instrument, and the resulting wound is closed or allowed to heal according to the technique used.

This approach may be appropriate for certain scars that are unlikely to respond sufficiently to resurfacing alone. However, the procedure replaces the original scar with a different healing site, which may itself leave a small scar.

Fractional Laser Resurfacing

Fractional lasers may be used after focal scar treatment to improve the surrounding skin texture. However, laser resurfacing alone may have limited effectiveness for very deep ice pick scars. The important distinction is that ice pick scars often require targeted treatment of the deep depression before broader skin resurfacing is considered.

2. Boxcar Scars: Wider Depressions with Defined Edges

Boxcar scars look different from ice pick scars. Instead of a narrow opening, they appear as round, oval or sometimes rectangular depressions with relatively sharp edges.

The base of the scar is usually wider and flatter, creating a crater-like appearance. These scars are frequently visible on the cheeks and temples, particularly when light falls across the skin from the side.

How to recognise boxcar scars

• Round or oval depressions
• Clearly defined edges
• A relatively flat base
• Wider openings than ice pick scars
• Shallow or deep depressions

The depth of a boxcar scar is particularly important when selecting treatment. A shallow boxcar scar may respond to skin resurfacing, while a deeper scar may require a more targeted procedure.

How Are Boxcar Acne Scars Treated?

Fractional Laser Resurfacing

Fractional laser treatments create controlled microscopic treatment zones in the skin. The healing response encourages collagen remodelling, which may gradually improve the appearance of depressed scars and uneven texture.

Fractional CO2 lasers and other resurfacing technologies may be considered for selected boxcar scars. Shallow scars generally respond more favourably to resurfacing than deep, sharply defined depressions.

Microneedling Radiofrequency (MNRF)

Microneedling radiofrequency combines fine needles with radiofrequency energy delivered into the skin. This creates controlled thermal injury and stimulates collagen remodelling. MNRF may be considered for certain boxcar scars and broader textural irregularities. However, it may not sufficiently correct every deep boxcar scar when used alone.

Punch Elevation or Excision

For deeper boxcar scars with well-defined edges, a dermatologist may consider punch elevation or excision. Punch elevation involves lifting the depressed base of a suitable scar closer to the level of the surrounding skin.

These techniques are generally reserved for selected individual scars rather than widespread superficial irregularities.

Why Does Scar Depth Matter in Boxcar Treatment?

Two boxcar scars may look similar from a distance but differ considerably in depth. A shallow depression may improve with collagen-stimulating procedures, while a deep scar may need a procedure that physically addresses the depressed tissue.

This is why the treatment decision cannot be based only on whether a scar is classified as boxcar.

3. Rolling Scars: Why Does the Skin Look Uneven or Wavy?

Rolling scars create broad, shallow-looking depressions that give the skin an uneven or wave-like appearance. Unlike ice pick and boxcar scars, their edges are usually less sharply defined.

These scars develop when fibrous bands beneath the skin pull the surface downwards, creating areas of tethering. The surrounding skin remains relatively elevated, making the depressed areas more noticeable.

How to recognise rolling scars

• Broad depressions with sloping edges
• An uneven or wave-like skin surface
• Scars that become more visible under angled lighting
• Areas that appear pulled down beneath the skin
• A texture that may change when the skin is stretched

Rolling scars are particularly important to identify because the problem is not limited to the surface. The underlying fibrous attachments may need to be released before meaningful improvement can occur.

How Are Rolling Acne Scars Treated?

Subcision

Subcision is one of the commonly used procedures for tethered rolling acne scars. During the procedure, a dermatologist introduces a specialised needle or cannula beneath the skin to release the fibrous bands pulling the scar downwards.

Once these attachments are released, the depressed skin may become less tethered. The healing response may also contribute to collagen formation. Subcision may be performed alone or combined with other procedures, depending on the severity and distribution of scarring.

Dermal Fillers

In selected cases, dermal fillers may be used to provide support beneath depressed areas. They may be considered after subcision or for certain scars associated with volume loss. However, fillers do not replace the need to release significant fibrous tethering, and their suitability depends on the scar structure.

Fractional Laser or MNRF

Once the underlying tethering has been addressed, fractional laser or microneedling radiofrequency treatments may help improve the remaining textural irregularities. These procedures work through collagen remodelling rather than physically releasing the fibrous attachments.

For this reason, rolling scars may respond better to a combination approach than to resurfacing alone.

Ice Pick vs Boxcar vs Rolling Scars: Which Treatment Is Used for Each?

The following comparison explains why different types of acne scars may require different procedures.

These are general treatment approaches, not fixed prescriptions. The same procedure may be appropriate for more than one scar type, but the expected response depends on the depth, severity and surrounding skin condition.

Why Doesn’t One Acne Scar Treatment Work for Every Scar?

A common misconception is that one laser session or one collagen-stimulating procedure can address every type of acne scar equally. In reality, different scars involve different structural changes. An ice pick scar extends deep into the skin. A boxcar scar has a defined depressed base. A rolling scar may be held down by fibrous tissue. These differences determine what the treatment needs to achieve.

For example, resurfacing may improve the appearance of a shallow boxcar scar but have limited impact on a deep ice pick scar. Similarly, a rolling scar may remain depressed if the underlying tethering has not been adequately released. This is why identifying the type of scar is more important than choosing a procedure based only on its popularity.

Can Different Types of Acne Scars Be Treated Together?

Yes. In fact, many people have a combination of ice pick, boxcar and rolling scars on the same face. Someone may have deep ice pick scars on the cheeks, shallow boxcar scars near the temples and rolling scars across the lower cheeks. Treating all these scars with the same technique may not address each problem effectively.

A dermatologist may therefore recommend a combination of procedures, sometimes performed in stages.

For example:

• TCA CROSS may be considered for individual ice pick scars.
• Subcision may be used for tethered rolling scars.
• Fractional laser or MNRF may be considered for suitable boxcar scars and overall texture improvement.

These treatments are not necessarily performed together or during the same appointment. The sequence depends on scar severity, skin condition, healing response and the possibility of complications.

Which Is Better for Acne Scars: Laser or Microneedling RF?

Both fractional laser and microneedling radiofrequency are used in acne scar management, but they work differently. Fractional lasers create microscopic treatment zones using laser energy. Depending on the device, they may target the skin surface, deeper tissue or both. MNRF delivers radiofrequency energy through fine needles to stimulate remodelling within the skin. Both approaches can help improve certain depressed scars and uneven texture. However, neither is automatically better for every patient.

The choice depends on:

• Scar type and depth
• Skin tone and pigmentation tendency
• Severity of textural changes
• Expected downtime
• Previous treatment response
• Presence of active acne
• Individual healing characteristics

In Indian skin tones, post-inflammatory hyperpigmentation is an important consideration, particularly with more aggressive resurfacing procedures.

A dermatologist must balance the potential improvement against the risk of pigmentation changes, irritation and other complications.

Can Acne Scars Be Removed Completely?

This is one of the most important questions to discuss before starting treatment. Acne scar procedures aim to improve the appearance of scars, not guarantee completely scar-free skin. Some scars may respond significantly to treatment, while others may remain partially visible even after multiple sessions. The degree of improvement depends on several factors, including the type and depth of scarring, skin characteristics, treatment selection and individual healing response.

In clinical practice, acne scar severity may be assessed using grading systems such as the Goodman and Baron classification. The aim is often to reduce the severity and visibility of scarring so that the skin appears more even, including at normal conversational distances.

However, complete correction is not always possible. Setting realistic expectations is an essential part of acne scar treatment.

How Many Sessions Are Needed for Acne Scar Treatment?

There is no fixed number of sessions suitable for everyone. A person with a few isolated ice pick scars may require a very different treatment plan from someone with widespread mixed scarring.

The number of sessions depends on the selected procedure, scar severity, treatment response and healing time. Collagen remodelling is a gradual process. Although some changes may become noticeable during the initial healing period, further improvement can develop over the following months.

Certain procedures may also require longer intervals between sessions to allow adequate healing and assessment. Rather than focusing only on the number of sessions, it is more useful to understand what each procedure is intended to improve.

Should Active Acne Be Treated Before Acne Scars?

In most cases, controlling active inflammatory acne is an important priority before beginning elective scar procedures. New inflammatory lesions can continue to damage the skin and create additional scars.

If breakouts are still frequent, a dermatologist may first recommend appropriate acne treatment to reduce inflammation and prevent further scarring. Once acne is adequately controlled, scar treatment can be planned according to the existing skin damage. Some scar procedures may still be considered in carefully selected patients with limited active acne, but this decision requires individual assessment.

What Should You Know Before Starting Acne Scar Treatment?

Before undergoing a procedure, it is important to understand that acne scar treatment involves controlled injury and healing. Depending on the procedure, temporary redness, swelling, bruising, crusting or sensitivity may occur. Some treatments also carry risks of pigmentation changes, infection, prolonged redness or additional scarring.

These risks may vary with the procedure, treatment intensity, skin tone and individual healing response. A proper consultation should therefore include an assessment of the scars, discussion of available options, expected downtime and realistic treatment outcomes. It is equally important to follow post-procedure instructions, avoid picking at healing skin and use appropriate sun protection.

Acne Scar Treatment at Influennz Skin Clinic

Acne scars can be difficult to treat when their underlying structure is not adequately addressed. At Influennz Skin Clinic in Hauz Khas, South Delhi, acne scar management is approached through an individual assessment of scar type, depth, severity and skin characteristics.

Dr. Geetika Srivastava evaluates whether the scarring involves narrow deep pits, sharply defined depressions, fibrous tethering or a combination of different patterns. Depending on the assessment, suitable procedures may include fractional laser resurfacing, microneedling radiofrequency, subcision or other scar-specific treatments.

The aim is to select procedures that address the actual structure of the scars while considering skin safety, recovery and realistic improvement. To understand the available procedures and consultation approach, explore Acne Scar Treatment at Influennz Clinic.

Frequently Asked Questions About Acne Scar Types and Treatment

1. Which type of acne scar is the hardest to treat?

Deep ice pick scars are often challenging because they extend further into the skin and may respond poorly to conventional resurfacing alone. Deep boxcar scars and severely tethered rolling scars can also be difficult to treat. The response depends on the individual scar rather than its name alone.

2. Can ice pick scars be treated with laser alone?

Laser resurfacing may improve the surrounding texture, but very deep ice pick scars often require targeted procedures such as TCA CROSS or punch excision. A combination approach may be considered.

3. Is subcision suitable for all acne scars?

No. Subcision is particularly useful for rolling scars caused by fibrous tethering. It is not usually the primary treatment for narrow, deep ice pick scars.

4. Do boxcar scars respond better to laser or MNRF?

Both treatments may help selected boxcar scars. Shallow scars may respond to resurfacing or collagen-stimulating procedures, while deeper scars may require punch techniques or other targeted treatments. The choice depends on scar depth and skin characteristics.

5. Can microneedling remove deep acne scars?

Microneedling can improve certain acne scars through collagen remodelling, but deep ice pick scars and severely tethered rolling scars may require additional procedures. Complete scar removal cannot be guaranteed.

6. Can creams or serums remove pitted acne scars?

Topical skincare can support skin health and help manage active acne or pigmentation, but it generally cannot correct established deep depressions caused by collagen loss or fibrous tethering.

7. Are acne scar treatments safe for Indian skin?

Many acne scar procedures can be performed on Indian skin tones with appropriate patient selection and treatment settings. However, pigmentation changes are an important risk, particularly with aggressive resurfacing. Dermatological assessment and suitable aftercare are essential.

8. Will acne scars return after treatment?

Structural improvement achieved through successful scar treatment may be long-lasting. However, additional acne scars can develop if inflammatory acne continues. Some scars may also remain partially visible or require further treatment.

9. Is it possible to have all three types of acne scars together?

Yes. Mixed scarring is common. A person may have ice pick, boxcar and rolling scars in different areas of the face, which is why combination treatment is often considered.

10. When is the right time to start acne scar treatment?

Scar treatment is generally planned once active inflammatory acne is adequately controlled. The appropriate timing also depends on skin health, medication history, scar maturity and the procedure being considered.

Medical Disclaimer: This article is intended for general educational purposes and does not replace professional medical advice. Acne scar treatments require individual assessment by a qualified dermatologist. Results, recovery time and potential risks vary according to scar type, skin condition and treatment method.