Acne Scars vs. Post-Inflammatory Hyperpigmentation

March 12, 2026 Carly Sanchez

If you have acne, you have probably searched something like “how do I get rid of my acne scars?” more than once. And I get it. When a breakout finally starts to heal, it can still leave behind those frustrating red marks, dark marks, or lingering discoloration that make it feel like the acne is still there. But here’s the part that surprises a lot of people: those marks are not always acne scars. In many cases, what you are actually seeing is post-inflammatory hyperpigmentation, also called postinflammatory hyperpigmentation, or PIH for short. Sometimes it can also be postinflammatory erythema, which shows up more as lingering redness. That is very different from a true acne scar.

This distinction matters because these are two different problems with two different treatment paths. Post-inflammatory hyperpigmentation is mostly a color issue. An actual acne scar is a texture and structure issue. If you do not know which one you have, it is easy to waste time on the wrong products or the wrong procedures.

First, let’s talk about what happens in the skin

To understand the difference between post-acne marks and acne scarring, you first need to understand what is happening inside an inflamed breakout.

An acne lesion starts when oil, bacteria, and dead skin cells get trapped inside the pore. As pressure builds up around the hair follicles, the wall of the follicle can weaken. If it ruptures under the skin, all of that trapped material spills into the surrounding tissue. Once that happens, the body launches an inflammatory response.

This is the part I talk to my clients about in consultation all the time.

Your body sees that material like a threat. White blood cells rush into the area to defend the skin. They release enzymes in an attempt to break down the debris and fight the bacteria. The problem is that the body is not always neat about this process. In trying to clean up the breakout, those enzymes can also damage more of the follicular wall and the surrounding collagen. That means the inflammatory battle itself can create more tissue injury. AKA Ice pick and Boxcar scars.

If the inflammation stays more superficial, you may be left with red marks, brown marks, or dark spots. If the inflammation is deeper and more destructive, it can damage collagen in the deeper layers of the skin and leave behind actual scars. That is why deeper inflammatory breakouts, especially cystic acne, are much more likely to lead to acne scarring.

What is post-inflammatory hyperpigmentation?

Post-inflammatory hyperpigmentation is a common skin condition that happens after skin inflammation. When the skin gets inflamed, it can respond by producing extra pigment. That extra pigment comes from an overproduction of melanin, also called excess melanin production.

The result is flat discoloration left behind after the breakout heals. These dark spots, brown marks, or other forms of skin discoloration are not usually scars. They are pigment changes. This is why PIH is considered a color issue rather than one of the skin’s texture.

PIH can happen in any skin type, but it is especially common in people with darker skin tones, because the skin is more reactive to inflammation and more likely to produce extra pigment. In lighter complexions, people may notice more lingering redness instead, which is often postinflammatory erythema rather than true pigment.

When pigment sits closer to the surface, it is often called epidermal pih, and it usually responds better to treatment. If the pigment is deeper, it can take longer to fade.

It is also important not to confuse PIH with age spots or sun spots. Those are different. PIH is specifically the result of a skin injury or inflammation, which makes it a very common result of acne. That said, sun exposure can absolutely make PIH worse and make those marks last longer.

What is an actual acne scar?

A true scar is different because it involves structural changes in the skin.

Instead of just changing the color of the skin, acne scars change the skin texture, skin’s texture, or contour of the skin itself. That happens when inflammation damages collagen in the deeper layers of skin and the body does not rebuild that tissue evenly during the healing process.

There are different types of acne scars, and the scar type matters because each one responds differently to treatment.

Atrophic scars

These are indented scars caused by tissue loss and poor collagen repair. They are the most common type of facial acne scar.

Ice pick scars are narrow and deep.
Boxcar scars are wider with more defined or sharp edges.
Rolling scars create uneven, wave-like texture.

These are all forms of atrophic scars.

Hypertrophic scars

Hypertrophic scars are raised scars that stay within the boundaries of the original breakout.

Keloid scars

Keloid scars are also raised, but they can grow beyond the original site of injury. These happen when the skin produces too much collagen during healing.

So here is the simplest way to think about it:

PIH and post-breakout redness = flat colour change
Acne scars = textural changes and permanent changes to the skin’s structure

If the area is flat, you are probably dealing with pigment or redness. If the area is uneven, indented, thickened, or raised, you are more likely dealing with real scarring.

Why controlling active acne matters so much

This is the part people want to skip, but it is honestly one of the most important parts of the conversation.

If you still have active acne, you are still creating new inflammation. That means you are still creating new opportunities for PIH and scarring. You cannot fully fade post-acne marks if your skin is constantly making new ones.

This is why acne control is step one.

For many acne-prone people, that means using carefully selected topical treatments and active ingredients that reduce inflammation and prevent new clogged pores. Ingredients like benzoyl peroxide, salicylic acid, and azelaic acid can all play a role depending on the skin and the type of acne. The goal is to stop the cycle at the source.

Best treatment options for post-inflammatory hyperpigmentation

When it comes to pih treatment, I personally love chemical peels.

For flat dark spots and discoloration after acne, chemical peels are a really effective way to help lift pigment, improve turnover, and move the skin through the healing cycle faster. This is especially true when the marks are pigment-based and not textural.

I also like supportive home care that helps with tone, healing, and inflammation. Depending on the client, some of my favorite Skin+ picks for post-inflammatory pigmentation and post-acne marks include:

Clarify C Serum is a gentle vitamin C serum for acne-prone and sensitive skin that helps visibly brighten and smooth the look of post-breakout marks.

The OmniLux Clear LED Mask is one I really like for clients dealing with post-acne marks because I have seen it accelerate the healing process when they use it consistently. It can be such a helpful addition when the goal is to calm inflammation, support recovery, and help the skin heal better after breakouts.

Another strong option for acne-prone skin that is dealing with uneven tone is CytoClear Mandelic Acid 3-in-1 Serum. Its product page specifically mentions helping clear impactions and reduce uneven tone and dark spots caused by blemishes or breakouts.

And of course, sun protection matters. A lot. If you are trying to fade PIH and you are not taking sun exposure seriously, you are making the process much slower.

Best treatment options for actual acne scars

Actual scars need a completely different approach.

If the issue is a structural change in the skin, you need treatment options that address the structure. That may include:

laser treatments
laser therapy
procedures that stimulate collagen production
scar-specific professional treatments
dermal fillers in select cases

For true acne scarring, the best treatment depends on the actual scar type. Ice pick scars are treated differently than boxcar scars. Raised scars like hypertrophic scars and keloid scars need a different strategy than depressed scars.

That is why the gold standard is not one device or one procedure. The most effective way is to match the treatment to the scar pattern, the patient’s skin, and the depth of damage.

Some people may also hear about pico laser, but not every scar patient is a candidate for every laser. This is especially important in darker skin tones, where overly aggressive procedures can create more pigment issues if not chosen carefully. Real scar treatment should be guided by experienced providers and customized to the individual.

Final thoughts

Not every mark left behind after acne is a scar.

A lot of what people call “scarring” is actually post-inflammatory hyperpigmentation, post-inflammatory pigmentation, or postinflammatory erythema. Those are usually flat post-acne marks caused by inflammation, pigment, or lingering blood vessel changes. True acne scars involve textural changes, tissue loss, or raised scar tissue.

That is why the right diagnosis matters so much.

If the mark is flat, think pigment or redness.If the skin texture has changed, think scar.

And if you want the best results, the first step is always the same: control active acne, reduce inflammation, and stop creating new damage in the first place.

This article is for educational purposes only and is not a substitute for personalized medical advice.

FAQ section

Are dark spots after acne the same as acne scars?

No. Dark spots are often post-inflammatory hyperpigmentation, which is a flat color change. Acne scars involve structural changes and affect the skin’s texture.

What is the difference between PIH and postinflammatory erythema?

PIH is pigment caused by excess melanin. Postinflammatory erythema is lingering redness related more to visible blood vessels and blood flow after inflammation.

Do acne scars go away on their own?

True acne scars usually do not fully go away on their own because they involve tissue change in the deeper layers of the skin. They often need scar-specific professional treatments.

What is the best treatment for post-inflammatory hyperpigmentation?

That depends on the skin, but common options include acne control, brightening topical treatments, chemical peels, supportive ingredients like vitamin c or azelaic acid, and strict sun protection.

Are chemical peels good for acne scars?

They can help some concerns, but chemical peels are generally better for discoloration and superficial texture than for deeper atrophic scars. True scar treatment often needs a more advanced plan.