Condition

Post-Inflammatory Redness

Post-inflammatory redness is the flat pink or red mark left behind after a spot heals. It comes from widened blood vessels rather than pigment, it is not a scar, and it usually fades on its own.
Dr. Schwarz, MD · Board-certified dermatologistLast reviewed September 8, 2026
Close-up of the lower cheek, mouth and jaw of a young person with light skin, turned three-quarters away from the camera against a pale blue background. Scattered flat pink-red marks cover the cheek and run down towards the jaw. The skin surface is smooth and even, with no raised spots and no change in texture.

Start here

These marks get called scars more than anything else I see, and they are not scars — they are flat, with nothing to feel. What you are looking at is skin where the blood vessels widened during the inflammation and have not fully settled. Mostly this is a waiting problem, not a treatment problem; the marks fade over months on their own, and what actually shortens the timeline is stopping new spots and wearing sunscreen. And do not pick — a squeezed spot leaves a redder mark that lasts far longer than the spot itself would have.

— Dr. Schwarz, Board Certified Dermatologist

Key Facts

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How commonVery common after inflamed acne, and the usual reason people believe their acne has left scars
Who gets itAnyone, but most visible on light and medium skin tones. On deeper skin tones a flat brown mark is the more common outcome
Curable or managedIt resolves. The large majority fade completely without any treatment
Prescription neededUsually not. Sun protection, treating the acne, and time do most of the work
Time to improveOften three to six months, and sometimes a year for stubborn marks on the cheeks

What It Is

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Post-inflammatory redness, also called post-inflammatory erythema, is a flat pink, red or purple mark where an inflamed spot used to be. It sits level with the skin around it — no dent, no lump, no scale, nothing to feel.

It comes from blood vessels, not pigment. Inflammation widens and slightly damages small vessels in the upper layer of skin, and they stay dilated after the spot heals. You are seeing blood flow through thin skin, which is why the mark goes pale when you press on it. A brown mark does not.

The shape gives it away. The mark sits exactly where the spot was and matches its outline, so scattered acne leaves scattered round pink marks. It shows most on the cheeks, where the skin is thinner and the vessels sit closer to the surface.

Three things get confused with it. A scar has texture, raised or indented, and does not resolve. Post-inflammatory hyperpigmentation is the flat brown or gray version, caused by pigment rather than vessels, and far more common on deeper skin tones. Rosacea is a spreading flush across the central face rather than distinct round marks.

This is temporary. Most marks are gone within six months to a year with no treatment at all.

Symptoms

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Pink or red marks

After Acne

Flat pink or red marks left where spots healed, caused by widened blood vessels rather than pigment. They blanch briefly when pressed. Most fade over three to six months without treatment.
Redness in a patch

After a Rash or Procedure

A pink flush over the area where a rash, a laser treatment or a chemical peel has healed. It usually settles as the skin repairs. Sun and heat make it look worse in the meantime.
Redness that stays

Persistent Vessels

Redness lasting beyond a year, where small vessels have stayed open rather than closed down. This does not fade on its own the way fresh marks do. Light and laser treatments are what usually shift it.

How It Looks by Skin Tone

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A pale, slightly lighter patch of skin on a cheek on deep brown skin, with a straight edge where a laser treatment stopped. The skin is smooth, with no redness, no scale and no crusting.A cheek on medium brown skin with two kinds of mark side by side: flat brown marks where some spots healed and duskier violet-red marks where others did, all level with the surrounding skin.
LightMediumBrownDeep

Which mark a spot leaves depends heavily on skin tone. On light and medium skin tones, an inflamed spot usually leaves a flat pink or red mark, because there is less pigment hiding the widened vessels underneath. On deeper skin tones the same spot usually leaves a flat brown or gray mark instead — post-inflammatory hyperpigmentation, which behaves differently.

That is a tendency, not a rule. People with deeper skin tones do get post-inflammatory redness, and it gets missed — partly because it can look violet or dusky rather than pink, partly because any brown mark on top of it is more obvious. Where both are present, the brown takes longer to go. The treatments do not overlap. Hydroquinone, kojic acid and cysteamine act on pigment cells and do nothing for a vascular mark. On red marks they mainly irritate the skin, and irritation on skin that pigments readily adds a brown mark to the red one. Device treatment splits the same way. Vascular lasers and intense pulsed light target the blood inside the vessels, and both need care on deeper skin tones, because pigment absorbs the same energy and can leave a lighter or darker patch. Ask for test patches, conservative settings, and a provider who treats deeper skin tones routinely. Sun protection applies equally to everyone. Ultraviolet light widens vessels and drives pigment, slowing both kinds of mark. A daily sunscreen gives the best return available for either.

Where It Shows Up

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Front view of a head with red marks on both cheeks, along both sides of the jaw and on the chin.
Cheeks and jawline
These marks appear wherever an inflamed spot was, so the cheeks and the jawline are the usual places. The cheeks show them most and hold them longest, because the skin there is thinner and the blood vessels sit closer to the surface.
Back view of a whole body with red marks across the upper back and both shoulders. The rest of the body is clear.
Chest and upper back
The chest and upper back are next, following body acne. They also follow eczema patches and healed cosmetic treatments anywhere on the body, and they fade on their own — usually over months rather than weeks.

What Happens in the Skin

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This is what is going wrong under the skin, in the order it happens. Click a step to see it.

How Post-Inflammatory Redness happens
Skin basics
BARRIEREPIDERMISDERMISBLOOD VESSELS0NORMAL SKIN1A SPOT INFLAMES THE SKIN2BLOOD VESSELS WIDEN3THE VESSELS STAY WIDENED4VESSELS SETTLE BACK SLOWLY

In healthy skin the tiny blood vessels in the upper layer sit at their normal width. They carry a steady, even amount of blood, so the color of the skin stays even and no single spot looks pink. They only open wider when something inflames the skin.

Almost always an inflamed acne spot, though eczema, a bite, a scratch or a cosmetic procedure does the same thing. The deeper and longer that inflammation lasts, the more likely it is to leave a mark behind.

The small blood vessels in the upper layer of skin open up to bring immune cells to the area. This is a normal part of healing, and it is what makes an active spot look red in the first place.

The spot itself resolves, but some of those vessels are left dilated or slightly damaged, and new ones can form alongside them. That widened network is still sitting under the skin, and the pink mark is simply blood showing through. It is why the mark goes pale when you press on it.

The body reabsorbs the extra vessels and narrows the rest over months, and the mark fades as that happens. Anything that keeps the area inflamed interrupts this step and stretches the mark out, and anything that flushes the skin simply fills the same vessels for an hour. Almost everything on the lists below is pushing on this step.

The outer film of dead cells and oil. It holds water in and keeps irritants out, and it is thinner than a sheet of paper. Almost every dry, itchy, stinging skin problem starts here.

The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

These marks form in four steps.

First, something inflames the skin — almost always an acne spot, though eczema, a bite, a scratch or a cosmetic procedure do the same. Deeper, longer-lasting inflammation is more likely to leave a mark.

Second, blood vessels in the upper layer of skin widen. That is normal inflammation bringing immune cells in, and it is what makes an active spot look red.

Third, some of those vessels are left dilated or slightly damaged, and new ones can form alongside them. Once the spot has resolved, that widened network is still sitting under the skin. The pink mark is what shows through.

Fourth, the vessels slowly return to normal. The body reabsorbs the extra ones and narrows the rest over months, and the mark fades with them. Anything that keeps the area inflamed — new spots, picking, irritating products, sun — interrupts that last step and stretches the mark out.

Risk Factors

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Some people mark after almost every spot; others come through the same acne clear in a fortnight. Mostly that is how reactive their blood vessels are, which is inherited.

Inherited
Lighter skin tone
With less pigment to mask them, widened vessels show through, so the mark is red rather than brown.
Inherited
Skin that flushes easily
People who blush readily or have visible vessels mark more often and hold marks longer.
Inherited
Thin skin on the cheeks
Cheek marks are more visible and slower to clear than the same marks on forehead or chin.
Other health conditions
Inflamed acne
Papules, pustules and nodules leave marks. Blackheads and whiteheads do not.
Other health conditions
Untreated acne
While new spots keep arriving, marks accumulate faster than they fade, so the skin looks no better.
Other health conditions
Rosacea
Skin already prone to widened vessels marks more readily, and the two can be hard to tell apart.
Other health conditions
Eczema and other rashes
Any inflamed skin condition leaves the same marks, in the shape of the rash rather than round spots.
Habits & products
Picking and squeezing
The commonest reason a mark is worse and lasts longer than it needed to. It spreads inflammation into skin that was never involved.
Habits & products
Cosmetic procedures
Peels, lasers, waxing and hair removal can inflame skin enough to mark it, particularly at settings that were too strong.
Habits & products
Sun exposure
Does not cause the mark. It widens vessels and slows the fading, so an unprotected summer stalls progress.

Course

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Red marks look worse after exercise, a hot shower or alcohol, because the same vessels fill more. That is not the mark getting worse. Underneath, the fading follows a steady arc.

As the spot healsThe starting point
This is the mark at its most obvious

A red mark is at its most obvious just as the spot finishes healing. That is when people notice it and assume it is getting worse. It is not.

First few weeksLittle visible change
Fading has started, but it does not show

Nothing seems to change for weeks, then a photograph taken three months earlier shows clear improvement.

Three to six monthsMost marks
Clear lightening

Most marks lighten noticeably over three to six months. Progress stalls over summer if sun protection slips.

Around one yearMost marks
Usually gone without treatment

Most marks are gone within a year with no treatment at all. Cheek marks are the slowest.

Beyond a yearThe stubborn few
Worth having checked

A few persist for a couple of years. A mark unchanged for more than a year is worth having looked at, to rule out a scar or something else.

What Makes It Better & Worse

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Red marks are four problems at once — inflammation, vessels widening, those vessels staying widened after the spot heals, and slow reabsorption. Almost nothing here is specific to red marks — anything that inflames the skin keeps them going, and anything that flushes it makes them look briefly worse.

What is driving yours?

FATBLOOD VESSELSBARRIEREPIDERMISDERMIS

Almost always an inflamed acne spot, though eczema, a bite, a scratch or a cosmetic procedure does the same thing. The deeper and longer that inflammation lasts, the more likely it is to leave a mark behind.

The small blood vessels in the upper layer of skin open up to bring immune cells to the area. This is a normal part of healing, and it is what makes an active spot look red in the first place.

The spot itself resolves, but some of those vessels are left dilated or slightly damaged, and new ones can form alongside them. That widened network is still sitting under the skin, and the pink mark is simply blood showing through. It is why the mark goes pale when you press on it.

The body reabsorbs the extra vessels and narrows the rest over months, and the mark fades as that happens. Anything that keeps the area inflamed interrupts this step and stretches the mark out, and anything that flushes the skin simply fills the same vessels for an hour. Almost everything on the lists below is pushing on this step.

What helps

  • Treat the acne properly The highest-value step, usually skipped.
  • Leave spots alone while they heal Not picking beats most products here.
  • A retinoid at night Treats acne, speeds turnover and evens tone.

What makes it worse

  • Picking and squeezing The biggest avoidable cause. Spreads the mark wider.
  • Leaving acne untreated Every new spot writes a new mark.
  • Sun without protection Widens vessels and keeps skin inflamed, stalling the fading.
  • Scrubbing and harsh actives Irritation is inflammation, which is step one.
  • Strong peels and lasers Too-aggressive settings leave fresh inflammation.
  • Pigment-lightening products Do nothing for a red mark, and often irritate.
  • Judging it in a mirror daily Drives product changes, and changes end up irritating.

What helps

  • Azelaic acid Calms inflammation and redness, gentle enough long term.
  • Niacinamide Supports the barrier, reduces redness a little.
  • Keep the routine gentle Every extra product is a chance to inflame settling skin.

What makes it worse

  • Heat and hot showers Flush the skin and make marks look worse for an hour.
  • Alcohol and spicy food Flush the skin briefly. No lasting harm.
  • Vigorous exercise Marks look brightest straight afterwards. Nothing is wrong.

What helps

  • Time Most fade substantially in three to six months, clear within a year.
  • Vascular laser or pulsed light The only treatments targeting the vessels directly.
  • Green-tinted color corrector Cancels red better than skin-toned concealer.

What helps

  • Daily sunscreen Keeps the fading you have earned.
  • Take photographs monthly Same light every four weeks is the only reliable check.

How These Treatments Work

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Treatments for Post-Inflammatory Redness do not all work in the same place. Tap one to see where it acts.

Pick a treatment
Skin basics
BARRIEREPIDERMISDERMISBLOOD VESSELSCALMS THE SOURCESTOPS IT PERSISTINGCALMS THE REACTIONTARGETS THE VESSELSIT FADES SLOWLY

Redness left behind only fades once the acne or rash above it is under control.

Light keeps the inflammation going and the mark visible for longer.

Settles the low-level inflammation still sitting in the skin.

For redness that has not faded on its own.

Most of it settles over months, with nothing done at all.

The outer film of dead cells and oil. It holds water in and keeps irritants out, and it is thinner than a sheet of paper. Almost every dry, itchy, stinging skin problem starts here.

The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

Over-the-Counter Products

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Everything here you can buy without seeing anyone.

Daily sunscreen
Daily sunscreen
Moderate evidence
Sun does not cause these marks, but it widens vessels and keeps the area inflamed, which is how an unprotected summer stalls months of fading. A daily sunscreen is the best return of anything you can buy for a red mark. Any broad-spectrum one is fine here; there is no need for the tinted mineral version that brown marks call for.
Five adapalene gel 0.1% tubes and boxes lined up on white, including Differin, Effaclar, PanOxyl and NeutrogenaLabeled cutaway diagram of a single skin pore, headed Adapalene. The epidermis is a brick-textured band across the top and the dermis is pink below it, with a yellow oil gland at the base of the pore and a small cluster of bacteria inside it. Three callout lines point in: decreases dead cells in pore and decreases oil production are drawn in dark navy as main effects, and decreases inflammation is drawn in gray as a lesser one.
Moderate evidence
The only over-the-counter retinoid strong enough to genuinely control inflamed acne, which is what stops new marks being written. It also speeds up turnover and evens out overall tone. Start three nights a week and build up, because the red, flaky phase is inflammation and will make the marks you have look worse for a few weeks.
Five azelaic acid tubes and bottles on white, most marked 10 percent, from Peach Slices, Paula's Choice, Facetheory, The Ordinary and NaturiumDiagram: how Azelaic Acid 15% (Finacea) works in the skin
Moderate evidence
One of the few over-the-counter ingredients that acts on redness rather than pigment, calming inflammation while also treating the acne behind it. It is gentle enough to use twice a day for the many months this takes. Expect it to take the heat out of the marks gradually rather than clear them.
Six niacinamide products on white, including The Ordinary 10% + Zinc 1%, Paula's Choice Booster and EltaMD UV ClearLabeled cutaway diagram of a single skin pore, headed Niacinamide. The epidermis is a brick-textured band across the top and the dermis is pink below it, with a yellow oil gland at the base of the pore and a small cluster of bacteria inside it. Two callout lines point in: decreases inflammation is drawn in dark navy as the main effect, and decreases oil production is drawn in gray as a lesser one. Nothing points at the dead cells blocking the pore.
Limited evidence
Supports the skin barrier and takes the edge off general redness, which helps skin that is settling after acne. Its effect on an individual red mark is small. It is worth including because it almost never irritates, and irritation is the main way people prolong these marks.
Five centella creams on white, a green-tinted jar plus tubes labeled Madagascar Centella, Madeca Cream and Cica Cream Plus16:9 hero for Centella Asiatica (Cica). Never cropped: the tone strip and the corner logo depend on the full frame.
Limited evidence
A soothing ingredient used to calm skin that is red and reactive after acne or a procedure. It makes a routine more comfortable and is unlikely to cause trouble. It does nothing to the widened vessels themselves, so treat it as comfort rather than treatment.
Green-tinted color corrector
Green-tinted color corrector
Limited evidence
Green sits opposite red, so a thin layer of green-tinted base cancels these marks far better than a skin-toned concealer, which tends to look thick and still pink. It changes nothing underneath and it is not a treatment. It is a genuinely useful option for the months in the middle, when the marks are fading but not gone.
Pigment-lightening products
Pigment-lightening products
Weak evidence
Vitamin C, hydroquinone, kojic acid, arbutin and cysteamine all act on pigment, and a red mark has no extra pigment in it. They do not change the color, and they frequently irritate the skin, which is inflammation and stretches the mark out further. If you have brown marks as well, those are the ones these products are for.

Prescriptions

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These need a prescription.

A plain white medicine tube lying at an angle on a white background, capped, labeled Tretinoin in black with a navy blue swoosh curving along its length.Diagram: how Tretinoin works in the skin
Moderate evidence
Prescription strength retinoid, used here mainly to stop new inflamed spots, with the useful side effect of evening out overall tone as the skin turns over faster. It does not target the vessels directly. The first six to eight weeks are red and flaky, so it is worth knowing that the marks will look worse before they look better.
16:9 hero for Azelaic Acid 15% (Finacea). Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Azelaic Acid 15% (Finacea) works in the skin
Moderate evidence
The prescription strength of the same ingredient, and one of the few topicals that is used for both acne and facial redness. It is a sensible choice when the over-the-counter version helped but not enough, or when rosacea and these marks are hard to separate. It stings for the first week or two in most people and then settles.
A white squeeze tube lying on white, labeled Mirvaso above a blue swoosh16:9 hero for Brimonidine (Mirvaso). Never cropped: the tone strip and the corner logo depend on the full frame.
Weak evidence
Squeezes the small vessels shut for several hours, so it makes redness disappear temporarily. It is a rosacea product, and it is a poor fit for distinct round marks. When it wears off the redness can come back stronger than it started, so it is not something to reach for while these marks fade on their own.

Procedures

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These are done in the office, usually over several visits.

A patient in protective goggles lying under a large laser head positioned over their face16:9 hero for Pulsed Dye Laser (V-Beam). Never cropped: the tone strip and the corner logo depend on the full frame.
Moderate evidence
The most direct treatment there is, because it is absorbed by the blood inside the widened vessels and collapses them. Usually two to four sessions, and it works best on marks that have stopped improving on their own. Most people never need it, and it is normally kept for marks that have not moved after a year.
16:9 hero for IPL (Intense Pulsed Light). Never cropped: the tone strip and the corner logo depend on the full frame.
IPL (Intense Pulsed Light)
Moderate evidence
Broad-spectrum light that also targets blood in the vessels, and it covers a whole cheek quickly, which suits scattered marks. It is less precise than a pulsed dye laser and usually needs more sessions. Because the same light is absorbed by pigment, it needs real care on medium and deeper skin tones.
A gloved hand guiding a laser handpiece along a patient's lower leg16:9 hero for Nd:YAG Laser. Never cropped: the tone strip and the corner logo depend on the full frame.
Limited evidence
Reaches deeper vessels and passes through surface pigment more safely, which is why it is often the vascular laser chosen for deeper skin tones. Results on these marks are less predictable than with a pulsed dye laser. A test patch first is the sensible way to find out whether it suits your skin.
A patient lying under a blue LED light panel with their eyes covered16:9 hero for LED Light Therapy. Never cropped: the tone strip and the corner logo depend on the full frame.
Weak evidence
Red and blue light panels are marketed for redness, and the light is nowhere near strong enough to affect the vessels causing these marks. Blue light has some effect on acne bacteria, so any benefit here is indirect at best. It is safe and pleasant, and it is not a reason to delay treating the acne properly.

When to See a Dermatologist

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Most red marks do not need a doctor. They fade with time and sun protection, and the useful over-the-counter steps are simple. Go in if the acne causing them is still active — that is the part worth treating, and the effective treatments are prescription-only. Book as well if a mark is unchanged after a year, if any mark is raised or indented and something you can feel, which is a scar rather than this, if redness is spreading across the central face, or if a mark is growing, bleeding, scaling or appeared with no spot before it. Two checks settle it in the room — a finger run over the marks, and pressing them, since a red mark goes pale and a brown one does not. Early scarring can hide inside a red mark, so no verdict on texture in the first few months.

— Dr. Schwarz, Board Certified Dermatologist

Complications

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Lookalikes

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Rosacea

Both are red faces in someone who is not sure why. Rosacea is a spreading flush across the central face, cheeks, nose, chin and forehead, with visible vessels and often a burning or stinging feeling, and it comes and goes with heat, alcohol and stress. These marks are distinct round patches sitting exactly where individual spots used to be, and they do not spread. The two can also run together in the same person.

Acne Scarring

This is the mix-up that sends most people looking for the wrong treatment. The test is touch rather than color. A scar has texture, a dent or a raised lump you can feel, and it does not resolve on its own. These marks are completely flat and they fade. Both can sit in the same cheek, so it is worth running a fingertip over each one instead of judging by how red it looks.

Post-Inflammatory Hyperpigmentation

The same story with a different ending: a flat mark left exactly where a spot was, but brown or gray instead of pink. Pressing on it separates them, because a red mark goes pale under a fingertip and a brown one does not. It matters because brightening products are right for the brown version and useless on the red one, which is why so many people feel nothing is working.

Myths

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  • "These are acne scars." A scar has texture — a dent or a raised lump you can feel. These marks are flat and they fade. Calling them scars sends people to expensive treatments for a problem that resolves anyway.
  • "A brightening serum will fade them." Brightening products act on pigment, and there is no extra pigment in a red mark. They usually irritate without changing the color.
  • "Vitamin C or hydroquinone will help." Both work on pigment. They are right for flat brown marks and wrong for red ones, which is why so many people feel nothing is working.
  • "They are permanent if they have lasted this long." Most take three to six months, and cheek marks longer. A year is common and means nothing has gone wrong.
  • "Exfoliating more will get rid of them." The color comes from vessels below the surface. Nothing to scrub off, and scrubbing adds the inflammation that caused the marks.
  • "Redness after a spot means it got infected." It does not. It is the normal aftermath of inflammation, in skin that healed as it should.
  • "Only fair skin gets these." Most visible on light and medium skin tones, but they happen on deeper skin tones too, where they look violet or dusky and get missed.

Questions Patients Ask

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How long do these take to fade?

Three to six months for most, up to a year for stubborn ones, particularly on the cheeks. That assumes no new spots and daily sun protection. A mark that has not moved after a year is worth a look.

Is this a scar?

Only if you can feel it. Scars have texture — a dent or a raised lump — and do not resolve. These marks are flat, go pale when you press them, and fade. Most people who think they have acne scars have these.

Why are my marks red when my friend's are brown?

Skin tone, mostly. Lighter skin lets widened vessels show through as pink or red. Skin with more pigment answers the same inflammation with extra pigment — a flat brown mark. Some people get both.

Will a brightening cream help?

No. Those products act on pigment, and a red mark has none extra. They tend to irritate instead, which can prolong the mark. If you have brown marks too, that is what brightening products are for.

Why do they look worse after a hot shower or the gym?

The vessels causing the color fill more when skin flushes. It settles within an hour, and it means nothing about healing.

Can a laser get rid of them faster?

Sometimes. Vascular lasers and intense pulsed light target the blood in the vessels and can speed things up over a few sessions. Most people do not need them; they are best kept for marks that have not improved after a year. Settings must match your skin tone.

References

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