Acne scarring is the permanent change in the surface of the skin left behind after inflamed acne heals. It is a texture problem rather than a color one, and the flat brown or pink marks people often call scars are something else entirely. A keloid is a scar that keeps growing after the wound has already healed, spreading past the edge of the original injury. Keloids are not cancer, but they can itch, hurt and keep enlarging, and they are far more common on deeper skin tones.
The same eight facts on every condition comparison.
It follows inflammatory acne.
Inflammation can damage tissue around a follicle.
Scars can be sunken or raised.
Lost support causes depressions; excess tissue causes raised scars.
Several types often coexist.
Lighting also changes how visible depressions look.
Marks and scars differ.
Pigment or redness can fade separately from true contour change.
It is an overgrown scar.
A keloid extends beyond the boundaries of the original skin injury.
It can persist.
Keloids can stay raised, itchy or painful long after the wound heals.
It is benign but stubborn.
Treatment can be difficult and recurrence is common.
Not every raised scar is a keloid.
Unusual or changing growths may need a biopsy.
Ice-pick scars Narrow, deep pits.
Boxcar scars Wide with sharp edges.
Rolling scars Wave-like dips with soft edges.
Hypertrophic and keloid scars Raised scars.
Keloid scar Grows past the wound edge; often returns.
Earlobe keloid A rounded scar grows around an ear-piercing site.
Hypertrophic scar Stays within the wound; may flatten.
Deep acne inflammation can damage the supporting tissue in the dermis. Healing may leave too little collagen, tethered tissue or excess collagen, producing indented or raised scars.
Scar-producing cells keep making collagen after a wound has closed. The resulting dense scar grows beyond the boundaries of the original injury.
Acne Scarring. Develops after inflamed acne, often beginning in adolescence or young adulthood.
Keloids. Often arise in teenagers and younger adults after a skin injury, piercing or inflamed spot.
Acne scars form when deep, inflamed breakouts destroy collagen as they heal. Most scars are indented, from collagen loss.
Keloids form when the body makes too much collagen while healing a wound. The scar keeps growing past the original injury.
The tendency to scar runs in families.
Keloids often run in families and are far more common in people with darker skin.
Evidence labels come from each condition’s own treatment list.
The best-evidenced thing you can buy for scars, and only for raised and keloid ones. It has to be worn most of the day, every day, for two to three months before it is worth judging. It does nothing at all for an indented scar.
Used nightly over months it gradually improves surface texture and the tone around a scar, and it keeps treating the acne that would cause the next one. It will not lift an established dent. Think of it as the background treatment that procedures are done on top of.
The most commonly recommended scar remedy there is. It has been studied properly for exactly this and did not help, and it causes an itchy rash in a fair number of people. Silicone is the option with real evidence behind it, and only on raised scars.
Rubbing vitamin E oil on a keloid is one of the most common pieces of advice given, and it has not been shown to flatten one. In some people it also causes an itchy rash where it is applied. It is not a reason to delay treatment that works.
The best-supported thing you can buy for keloids without a prescription. Worn or applied over the scar for most of the day, over months, it softens and flattens it and eases the itch. It works best on new scars and on preventing one after a wound, and it will not clear a hard, old keloid on its own.
Clip-on discs that squeeze an earlobe keloid from both sides, used mainly after a keloid has been injected or removed. They have to be worn for many hours a day for months to cut the chance of it coming back. They are uncomfortable at first, and stopping early is the usual reason they fail.
Taping a fresh scar takes some of the pull off it while it is healing, which matters most on the chest and shoulders where tension keeps a keloid growing. It is used for the first few months after a wound closes. It is prevention rather than treatment, and it does nothing for a keloid that is already established.
Widely sold as a scar gel, and the studies behind it are small and mostly unconvincing for keloids. Some people find it makes the scar feel more comfortable, which is not nothing. If you are choosing one product to buy, silicone is the better use of the money.
The prescription retinoid, stronger than retinol, used nightly over months. It improves surface texture and the marks around scars, and it keeps the acne that makes new scars under control. It does not fill an indented scar, and it is usually paused before resurfacing procedures.
Aimed at the flat dark marks sitting alongside the scarring, not at the scar itself. Clearing the pigment first makes it much easier to see how much true texture is there, which is why it usually comes before any texture treatment. It is used in courses rather than indefinitely.
Clobetasol Propionate. A strong steroid ointment put on the keloid and covered overnight, usually to take the edge off itching between injection appointments. Covering it is what gets any of it through thick scar tissue. It will not flatten a keloid on its own, and long spells of use thin the normal skin around the scar.
A thin tape with steroid built into it, cut to the size of the scar and worn most of the day. It gives steady low-dose treatment plus a little pressure, and it suits small keloids and people who want to stretch the gap between injections. It is fiddly on hairy skin and can irritate the skin at the edges.
This prevents scars rather than treating them, and on this page that is the most valuable thing on the list. It is the most reliable way to shut down the deep, inflamed acne that is still making new scars, and no texture treatment holds while spots keep arriving. Resurfacing is usually delayed for a period after the course ends — that timing is a conversation with your prescriber.
The mainstay for raised and keloid scars. Steroid injected into the scar flattens and softens it, usually over a series of injections four to six weeks apart. It does nothing for indented scars, and too much in one place can leave a dip or thinned, pale skin.
Triamcinolone Acetonide. The standard first treatment for a keloid: steroid injected directly into the scar, usually every four to six weeks. It calms the long-running inflammation and slows the cells making collagen, so itch and pain settle first and flattening follows over months. The main trade-off is a pale, thinned patch where it was given, which shows more on deeper skin tones.
A second medicine mixed with the steroid, or given on its own, when a keloid is stubborn or keeps returning. It targets the collagen-making cells directly, and combining it with triamcinolone works better than steroid alone in most studies. It stings more, and it can leave the surface sore or ulcerated for a short time.
Bleomycin injection. A chemotherapy drug used in tiny amounts inside the scar for keloids that have not responded to steroid and 5-fluorouracil. Small studies show it can flatten them. It is not widely offered, and dark spotting of the skin over the injection site is common, so it is a later option rather than an early one.
The most effective single option for indented scarring, and the one with the most downtime — about a week of raw, swollen skin and months of strict sun avoidance afterwards. It does most for boxcar and rolling scars; icepick scars need something aimed at them separately. Settings are dialled back on deeper skin tones because of the pigment risk.
Morpheus8. Needles carry heat below the surface, so it builds more collagen than needling alone while doing less to the top layer. That lower surface injury is why it is often the first choice for boxcar and rolling scars on deeper skin tones. Usually three or four sessions about a month apart, with the result still building for a year.
Fine needles injure the skin just enough to trigger new collagen. It does most for rolling and shallow boxcar scars, and very little for icepick ones. It is the gentlest of the resurfacing options, which also makes it the slowest — expect four to six sessions and judge it at a year, not at a month.
A needle is passed under a rolling scar to cut the fibrous bands tethering it down, so the floor lifts. It is aimed at rolling scars specifically and does nothing for icepick or boxcar ones. Bruising for a week or two is normal, and it is often done in the same visit as needling or filler.
Fraxel. Resurfaces without removing the surface, so recovery is a few days of redness and swelling rather than a week of raw skin. It gives less improvement per session than CO2 and needs more sessions to get there. It is the sensible middle option when the downtime of ablative laser is not workable.
TCA Peel and TCA CROSS. In the CROSS technique a single drop of strong acid is placed into the opening of an icepick scar so it heals narrower. It is one of very few things that reaches a scar this deep and this narrow. Several rounds are usual, and acid outside the pit can leave a mark, so the result depends heavily on who is doing it.
Filler placed under a shallow rolling or boxcar scar lifts the floor of it straight away, which makes it the only option here with a same-day result. It is temporary, lasting months to a couple of years depending on the product. It works best as a top-up alongside collagen-building treatment, not instead of it.
A single deep, narrow scar is cut out and closed, or punched out and grafted, trading a pit for a fine line that resurfacing can then blend. It suits a handful of stubborn icepick or deep boxcar scars, not a whole cheek. It is normally done before laser rather than instead of it.
Repeated medium-depth peels smooth the edges of shallow scars and even out the tone around them. The effect on texture is modest next to laser or needling. On this page peels earn their place mostly for the flat marks sitting alongside the scars rather than for the scars themselves.
Targets the blood vessels rather than the texture, so it calms the redness in and around a fresh scar and helps flatten raised ones. It will not lift a dent. It is most useful in the first year, when the color is what makes a scar stand out.
Polishes the very top layer of skin, which is nowhere near deep enough to reach the collagen that makes a scar. It can leave skin looking brighter for a few days. It is widely sold for acne scarring and it does not change acne scarring.
A laser aimed at the blood vessels in the scar. It helps with the redness, and some people find it softer and less itchy afterwards, so it is used alongside injections rather than instead of them. It does not flatten a thick keloid, and settings have to be chosen carefully on deeper skin tones to avoid pigment change.
A short course of low-dose radiation given within a day or two of removing a keloid, to stop the scar tissue rebuilding. For keloids that have already come back after surgery, it lowers the chance of another recurrence considerably. It is only available at some centers, and the long-term risks are discussed carefully before it is used, particularly in younger people.
Freezing can soften and flatten smaller keloids, and is sometimes used just before an injection to make the scar easier to inject. The problem is that freezing destroys pigment cells and often leaves a permanent white patch. On deeper skin tones, where most keloids occur, many dermatologists use it cautiously or not at all.
Cutting the keloid out works only as part of a plan. On its own it comes back in the large majority of cases, often bigger, so it is paired with injections at the time of surgery, pressure afterwards, or radiation. It is most useful for a big earlobe keloid or one that is limiting movement, where nothing else will get it flat.
Scars appear as the acne settles and look their worst in the first few months. Some of that fades over the first year. Treatment improves the picture after that, but it does not reset it.
Keloids follow a slow pattern, and the first months are when treatment helps most. Nothing looks unusual early, so the change often arrives months after the wound closed.
Keloid scars
A raised scar that grows beyond the spot that caused it, into skin that was never involved. They form most often on the chest, shoulders, upper back and jawline, and they are more common on deeper skin tones. They rarely settle on their own and can keep growing slowly for years, so they are worth treating early rather than watching.
Dark marks after treatment
Lasers, deep peels and aggressive needling all inflame the skin, and skin with reactive pigment cells answers inflammation by making more pigment. The result can be darker than what you started with, and it can take a year to settle. Conservative settings, a test patch and a provider who treats deeper skin tones regularly all lower the risk.
Confidence and mood
Scarring is permanent, visible, and usually arrives at the end of years of dealing with acne, and the effect on confidence and mood is well documented. It does not track with how bad the scarring looks to anyone else. It is a reason to be seen rather than to wait, because most scars can be made considerably less noticeable.
Coming back larger after surgery
A keloid cut out on its own comes back in most people, and often larger than the one that was removed, because the operation is another wound in the same high-risk skin. Surgery is still used, but as part of a plan with injections, pressure or radiation afterwards. If someone offers to simply cut it off, ask what will be done to stop it returning.
Itch, pain and tightness
Keloids frequently itch, sting or ache, and one sitting over a joint, the chest or an ear can feel tight and limit movement. For most people this, not the look of it, is the reason to get it treated. Itch and pain usually settle before the scar flattens, so treatment often feels worthwhile well before it looks it.
Pale, thinned skin after injections
Steroid injections can leave a pale, slightly sunken patch where they were given, and on deeper skin tones that lightening shows more and can last a long time. It often improves over months. Raise it before the first injection so the dose and technique are chosen with it in mind.
Seek care early for acne that is leaving scars. Have active breakouts controlled before choosing scar procedures.
Seek assessment for a growing, painful or itchy scar, or any lump whose diagnosis is uncertain. Discuss scarring risk before elective skin procedures.
No, and anyone saying otherwise is overselling. Most scars can be made much less visible, often hard to see in ordinary light, and a good plan usually combines two or three treatments.
Touch it, and look at it in side lighting. A scar has texture - you can feel a dent or a raised lump, and it casts a shadow. A mark is flat and differs only in color, and flat marks fade on their own.
Redness fades over six to twelve months, so scars look better at a year than at three months. The dent does not fill in. Raised scars often flatten over one to two years; keloids generally do not.
Once the acne is controlled and the skin is calm, usually a few months of stable treatment. If you have taken isotretinoin, most dermatologists wait a period after finishing before resurfacing - ask the doctor who prescribed it.
It depends on the shape. Icepick scars respond to TCA CROSS and punch excision, rolling scars to subcision and needling, boxcar scars to laser resurfacing and radiofrequency needling, raised scars to steroid injections and silicone. Most people have a mixture, so most plans combine treatments.
Squeezing forces the pore's contents sideways through its wall into surrounding skin instead of out through the surface. That spreads inflammation into tissue that was never involved - the exact injury the body repairs with a scar.
Realistically, no. The goal is flat, soft and no longer itchy or painful, which leaves a flat mark rather than normal skin. Most improve a great deal; very few disappear.
It is a real risk worth discussing rather than deciding alone. Re-piercing through or next to a keloid often makes it bigger. If you go ahead, some dermatologists treat around the piercing preventively and add pressure earrings. Going back to the same studio with no plan is the version that goes badly.
Site matters as much as skin. The chest, shoulders, earlobes, jawline and back of the neck are high risk, partly because that skin is under constant tension and movement. The same injury heals flat on the leg and keloids on the sternum.
They sting, and a firm keloid makes it uncomfortable, but it takes seconds. Most people need several, usually every four to six weeks, and the number depends on size, site and how long it has been there. Itching and pain improve first, flattening later.
It can. A pale, slightly sunken patch at the injection site is a recognized side effect, more noticeable on deeper skin tones, and it often improves over months. Raise it before the first injection.
Tell the surgeon before the operation, not afterward. It changes where the incision goes, how it is closed, whether the wound is taped, and whether preventive injections are given. Ask what will be done differently because of your keloid history.
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