After a breakout heals, the change left behind may be a flat red or brown mark, an indentation, or a raised area. These are often grouped together as “acne scars,” but clinically they are not the same thing. Acne marks mainly involve colour. True acne scars involve a structural change in the skin.
That distinction matters because colour and texture respond to different approaches. The clinic’s Acne Scars guide focuses on indented and raised scars, while its Acne Marks & Post-Inflammatory Pigmentation page covers flat colour changes that remain after inflammation.
Acne Marks Are Usually Flat
Acne marks develop after inflammation has settled. If the skin surface remains smooth but the area is pink, red, tan, brown, or grey-brown, the change is more consistent with a post-acne mark than a true scar.
Two common patterns are:
Post-inflammatory erythema: pink or red marks related to lingering vascular change after inflammation.
Post-inflammatory hyperpigmentation: brown or grey-brown marks caused by increased melanin production after inflammation.
Post-inflammatory hyperpigmentation is particularly relevant in medium to deeper skin tones. Sun exposure can make pigment more noticeable. Research on acne-associated hyperpigmentation also emphasizes controlling active acne, because new inflammatory lesions can create new marks.
True Acne Scars Change Skin Structure
Acne scars form when inflammation damages deeper skin and healing alters collagen. Instead of a flat colour change, the surface becomes indented, uneven, thickened, or raised.
Atrophic scars involve tissue loss and include several patterns:
Ice-pick scars: narrow, deeper pits.
Boxcar scars: broader depressions with more defined edges.
Rolling scars: wider depressions with a sloping appearance.
Hypertrophic and keloid scars are raised because excess scar tissue forms during healing. These behave differently from atrophic scars and need different treatment considerations. The individual architecture of acne scars matters because no single procedure fits every scar type.
A Simple Difference: Colour Versus Texture
A useful first question is whether the area is level with the surrounding skin.
If it looks different mainly because of colour but feels flat, it is more likely to be a mark. If there is a visible depression, ridge, thickened area, or uneven surface, structural scarring is more likely. Angled lighting can make textural scars easier to notice because depressions create shadows.
Some people have both at the same location. An indented scar may also carry red or brown discoloration, so one treatment target may not address the other.
Why the Difference Changes Treatment
Post-acne marks and acne scars have different biological targets.
For flat pigmentation, treatment may focus on sun protection, skincare, topical pigment-directed ingredients, chemical peels, or selected light and laser treatments depending on skin tone and pigment type. The clinic’s Pigmentation & Sun-Damage Treatment pathway explains why pigment treatment needs to be matched to skin type.
Red post-acne marks are different because vascular change may be the dominant feature. A systematic review found that light and laser devices were among the most frequently studied treatments for persistent post-acne erythema, while noting that no single gold-standard treatment has been established.
Structural scars require another strategy. Options may include resurfacing, radiofrequency microneedling, scar-specific techniques, or combinations selected according to scar type, depth, skin tone, and healing history. The clinic’s Scar & Stretch-Mark Treatment page describes this approach as remodelling rather than erasing scar tissue.
Active Acne Usually Comes First
Treating old marks or scars while new inflammatory breakouts continue can be frustrating because new lesions can create additional pigment changes and scars.
For this reason, controlling active acne is usually an important first step. The clinic’s Acne information notes that persistent, deep, painful, or scarring acne may benefit from clinical assessment. Early treatment can also help reduce the chance of accumulating additional acne sequelae.
The plan should account for ongoing inflammation rather than focusing only on what previous breakouts left behind.
Picking Can Make Both Problems Worse
Squeezing or picking acne can increase inflammation and tissue injury. That can raise the likelihood of lingering pigment change and may contribute to scarring.
The better strategy is to treat the acne itself rather than repeatedly manipulating lesions. For people still developing breakouts, the clinic’s Active Acne Treatment page outlines an approach that considers acne type, severity, skin characteristics, and previous treatment.
What an Assessment May Look At
When acne has left a mixture of marks and scars, assessment can separate the different targets. A clinician may consider:
whether changes are flat, indented, or raised
whether colour is red, pink, brown, or grey-brown
scar shape and depth
skin tone and history of pigment change
whether active acne is still present
previous treatments and response
any tendency toward thickened or keloid scarring
This matters because a person with mainly flat pigmentation may need a very different plan from someone with deep ice-pick scars, even if both call the concern “acne scarring.”
Frequently Asked Questions
Do acne marks always become scars?
No. Flat post-acne marks can occur without permanent structural scarring. They represent colour or vascular change rather than a loss or excess of scar tissue.
Do acne marks fade on their own?
Some do gradually fade, but the timeline varies. Pigment may persist longer in deeper skin tones, and repeated inflammation or sun exposure can prolong the problem.
Can one treatment fix marks and scars together?
Sometimes one treatment may influence more than one feature, but combination planning is often needed when both colour and texture are present. The approach depends on what is visible.
Can acne scars be removed completely?
Complete removal is usually not a realistic goal. Treatment aims to improve texture and make scars less noticeable, with results depending on scar type, depth, skin, and treatment response.
Identify What Acne Left Behind
The clearest distinction is simple: acne marks are primarily changes in colour, while acne scars are changes in structure. Many people have a mixture of both, which is why treatment should match the actual target.
If old breakouts have left persistent colour, indentations, raised areas, or a combination, an assessment can separate these features and prioritize active acne where necessary. The clinic’s Contact page can be used to discuss which concern is present and which treatment category may be appropriate.