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A keloid is not a thick scar. It is scar tissue that never got the signal to stop, so it grows past the edges of the wound and rarely settles on its own. Treatment is about control rather than removal, usually a course of injections over months, because cutting a keloid out on its own often produces a bigger one. If you have had one, tell every clinician before any procedure, including piercings and mole removals, because it changes how I would close a wound and whether I would do the procedure at all.
— Dr. Schwarz, Board Certified Dermatologist
Key Facts
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| How common | Common, and much more common on deeper skin tones. Published estimates for people of African descent range from roughly 5 to 15 percent |
| Who gets it | Most often people between about 10 and 30, people with a family history, and people with deeper skin tones. Rare in very young children and older adults |
| Curable or managed | Managed. Keloids can be flattened, softened and made much less symptomatic, but they rarely disappear and they come back readily |
| Prescription needed | Usually. Silicone and pressure are available over the counter. Steroid injections and the other effective treatments are done in a clinic |
| Time to improve | Months. Injections are usually repeated every four to six weeks, and a course commonly runs six months or longer |
What It Is
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A keloid is an overgrowth of scar tissue. When skin is injured deeply enough to reach the dermis, the layer beneath the surface, the body lays down collagen to repair it. In a keloid that repair never switches off. Collagen keeps coming, and the scar grows past the borders of the original wound into skin that was never injured.
That is the defining feature. A hypertrophic scar is also raised and thick, but it stays inside the wound outline and usually flattens over one to two years. A keloid crosses the border and keeps going, which changes what treatment can achieve.
Keloids are firm, rubbery and raised, and can be pink, red, purple, brown or darker than the skin around them. Older ones turn paler and harder. Most are itchy, tender or painful, and they feel tight over a joint or on the chest. Those symptoms, not the appearance, bring most people in.
They start after almost any injury that breaks the deeper skin: piercings, surgery, cuts, burns, vaccinations, insect bites, acne, ingrown hairs, folliculitis. Some appear with no injury anyone remembers, usually on the chest. Common sites are the earlobes, jawline, front of the chest, shoulders, upper back and back of the neck.
Keloids are not cancer and do not become cancer. They are not contagious and not caused by poor wound care, though infection and slow healing make them more likely. Who gets them is mostly genetic.
Symptoms
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Earlobe or Piercing
Chest, Shoulder or Jaw
Along a Surgical Scar
How It Looks by Skin Tone
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Keloids are not spread evenly. They are much more common in people of African, Afro-Caribbean, Hispanic, South and East Asian, and Mediterranean descent. Published estimates for people of African descent range from about 5 to 15 percent, against a much lower figure in very fair skin. Family history is common.
So risk belongs in the conversation before any elective procedure, and usually is not. If you have deeper skin tones, a personal or family history of keloids, or keloids now, say so before ear or body piercing, a tattoo, a mole or cyst removal, a cosmetic procedure or surgery. It can change the site, the technique, how the wound is closed, and whether preventive treatment starts that day instead of months later. Some triggers matter more here. Acne on the chest, shoulders and back can heal into keloids rather than flat marks. Ingrown hairs from shaving the beard area, called pseudofolliculitis barbae, leave keloidal scarring along the jaw and neck. Inflamed bumps at the back of the scalp and neck, called acne keloidalis nuchae, occur mainly in men with tightly coiled hair and can build into a firm band of scar. Treat these while they are still inflammation rather than scar. Treatment needs adjusting. Steroid injections can leave a pale, thinned patch, and that lightening is more visible and longer lasting on deeper skin tones. Cryotherapy destroys pigment cells and often leaves permanent white marks, which is why many dermatologists use it cautiously here or not at all. Neither is a reason to skip treatment, but raise both so the plan and the dose account for it. Expect flat dark marks around a treated keloid. Inflammation on deeper skin tones leaves post-inflammatory hyperpigmentation, which takes many months to fade. Daily sunscreen keeps those marks from deepening while the keloid is treated.
Where It Shows Up
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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 Keloids happens
Skin basics
The dermis is the layer beneath the surface, and it is built from collagen, the fiber that gives skin its strength. In skin that has never been injured, that collagen lies in flat, orderly bundles. Nothing is being repaired, so nothing is being added.
Something breaks the skin deeply enough to reach the dermis, the layer under the surface. That can be a piercing, an operation, a burn, a deep acne spot or an insect bite. Any wound that reaches this layer sets off a scar, and this is the only step you have much control over.
Every wound becomes inflamed while it repairs, and normally that inflammation switches off. In a keloid it runs longer and hotter than it should, so the repair signals keep firing after the wound has closed.
Cells called fibroblasts answer those signals by making collagen, the fiber that scars are built from. Here they make far too much of it, in thick disorganized bundles, and they do not stop when the wound is repaired. This is the step steroid injections push on.
Because the growth is driven by signals rather than by the shape of the wound, the scar spreads sideways into skin that was never injured. Skin that is pulled and moved constantly, like the chest and shoulders, keeps feeding that growth. This is the finished keloid, and almost everything on the lists below is pushing on it.
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.
Four things happen, in order. The skin is injured deeply enough to reach the dermis, the layer below the surface, which is what starts a scar. The inflammation that follows runs longer and hotter than it should, so repair signals keep firing. Fibroblasts answer by making collagen, far too much of it, in thick disorganized bundles, and they keep making it after the wound has closed. Because signals drive the growth rather than the shape of the wound, the scar spreads sideways into skin that was never cut.
Two things decide who this happens to. The first is genetics: keloids run in families, track strongly with ancestry, and that risk cannot be changed. The second is mechanical: skin under constant tension or movement, like the chest, shoulders and upper back, forms them far more readily, which is why the same injury heals flat on the leg and keloids on the sternum.
No single gene explains keloids, so treatments push on the inflammation and the collagen rather than fix a cause. That is why treatment is a course and not a cure.
Risk Factors
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Most of what decides whether you form keloids was set before the injury. You did not cause this.
Course
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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.
Nothing looks unusual yet, which is why keloids surprise people.
It turns thicker, firmer, redder or darker, and usually itchy. This is where a keloid and an ordinary healing scar diverge.
It grows out into surrounding skin. Itching, tenderness and a pulling feeling are common, and this is the phase people come in with.
It gets harder and paler but does not flatten the way a hypertrophic scar does. Most keloids stay, and some enlarge slowly for years. Do not plan around it clearing on its own.
Steroid injections are repeated every four to six weeks, and you judge progress over months. A treated keloid leaves a flat mark, not normal skin. Keloids come back readily, especially after surgery alone, so follow-up and repeat treatment are normal, not a sign something went wrong.
What Makes It Better & Worse
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A keloid is not one problem, it is four — a deep injury, inflammation that lasts too long, fibroblasts overproducing collagen, and tension that keeps the scar growing. You control only the first one, and almost everything that helps calms step two or slows step three.
What is driving yours?
Something breaks the skin deeply enough to reach the dermis, the layer under the surface. That can be a piercing, an operation, a burn, a deep acne spot or an insect bite. Any wound that reaches this layer sets off a scar, and this is the only step you have much control over.
Every wound becomes inflamed while it repairs, and normally that inflammation switches off. In a keloid it runs longer and hotter than it should, so the repair signals keep firing after the wound has closed.
Cells called fibroblasts answer those signals by making collagen, the fiber that scars are built from. Here they make far too much of it, in thick disorganized bundles, and they do not stop when the wound is repaired. This is the step steroid injections push on.
Because the growth is driven by signals rather than by the shape of the wound, the scar spreads sideways into skin that was never injured. Skin that is pulled and moved constantly, like the chest and shoulders, keeps feeding that growth. This is the finished keloid, and almost everything on the lists below is pushing on it.
What helps
- Treating the acne or folliculitis Controlling inflammation stops new keloids.
- Telling every clinician It changes how they cut and close.
What makes it worse
- Any new injury to high-risk skin Piercings, tattoos and mole removals each start one.
- Re-piercing a keloided earlobe The surest way to make it bigger.
- Untreated inflamed acne Every deep spot is a wound in the riskiest skin.
- Shaving that causes ingrown hairs Repeated bumps build into keloidal scarring.
- Surgery alone It comes back most times, often bigger.
What helps
- Silicone sheets or gel The best-supported option without a prescription.
- Steroid injections Triamcinolone is the standard first treatment.
- Starting early A new, soft keloid responds far better than a hard one.
- Laser for color and texture Vascular lasers reduce redness alongside injections.
- Daily sunscreen over the scar Stops the marks around it from deepening.
What makes it worse
- Picking, squeezing or scratching Restarts the inflammation.
- Delayed healing or wound infection The longer it stays inflamed, the more the scar overshoots.
- Rubbing from clothing or straps Backpack, bra and helmet straps irritate it.
What helps
- Combination treatment, not surgery Surgery plus injections or radiation limits recurrence.
- Adding another injected medicine Triamcinolone is often combined with 5-fluorouracil.
- Cryotherapy, chosen carefully It flattens some keloids but often leaves permanent pale patches, a drawback on deeper skin tones.
What makes it worse
- Waiting to see if it settles Old, hard keloids improve less.
- Stopping treatment once it flattens Keloids re-thicken if you abandon the course.
What helps
- Pressure earrings after treatment Worn for months, they cut recurrence.
- Silicone or paper tape on a new scar Taping cuts tension for the first months.
What makes it worse
- Tension across the scar Mechanical stress drives more growth.
How These Treatments Work
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Treatments for Keloids do not all work in the same place. Tap one to see where it acts.
Pick a treatment
Skin basics
Tells the cells to stop laying down collagen. Usually a series, weeks apart.
Months of daily use, and best started early.
Changes the color more than the height.
Cut out on its own it usually returns larger, so it is paired with injections or radiation.
Piercings, procedures and even acne can start another one.
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.





No over-the-counter options listed yet.
Prescriptions
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These need a prescription.


No prescription treatments listed yet.
Procedures
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These are done in the office, usually over several visits.








No procedures listed yet.
When to See a Dermatologist
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Go earlier than feels necessary. Keloids are far easier to treat while young, soft and still growing, and the usual reason one becomes hard to manage is that it was watched for a year first. Book if a scar is still thickening two to three months after the wound healed, if it has spread past the edge of the injury, if it itches, hurts or feels tight, if it is growing after a piercing, or if it sits on the chest, shoulders, earlobes, jawline or back of the neck. Book too if you have had a keloid and are planning any procedure, because preventive treatment at the time of surgery beats treatment started after a new keloid appears. Be seen promptly if a lump is growing fast, bleeding, breaking down or discharging, if it is hot and painful, or if it limits how a joint or your ear moves. A firm, growing lump with no preceding injury, or a scar that changes character, breaks down or grows unusually fast, needs examining and sometimes a biopsy. Ask whether yours is a keloid, which crosses the wound outline and persists, or a hypertrophic scar, which stays inside it and flattens.
— Dr. Schwarz, Board Certified Dermatologist
Complications
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Coming back larger after surgery
Itch, pain and tightness
Pale, thinned skin after injections
Lookalikes
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Hypertrophic scar
Epidermal Inclusion Cyst
Acne Scarring
Myths
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- "A keloid is just a thick scar." A thick scar that stays inside the wound outline and flattens over a year or two is a hypertrophic scar, and it settles. A keloid grows past the edge and does not. They are treated differently.
- "You can just have it cut off." Cut one out with nothing else afterward and it returns in the large majority of cases, often bigger. Surgery is used, but inside a plan with injections or radiation.
- "Vitamin E, onion extract gel or scar creams will get rid of it." Widely sold, weakly supported. Silicone is the over-the-counter option with reasonable evidence, and even that flattens and soothes over months rather than removing anything.
- "Only people with deeper skin tones get keloids." Far more common on deeper skin tones, but fair skin gets them too, particularly on the chest, shoulders and earlobes. Skin tone changes the odds, not the possibility.
- "It will go away eventually." Most do not, and some slowly enlarge for years. Planning around that is the most common reason people arrive with a keloid that is now hard to treat.
- "Keloids can turn into cancer." They do not. A keloid is overgrown scar tissue, not a tumor. Still, a firm lump that grew with no preceding injury should be examined rather than assumed.
- "If I keep the wound covered and clean, I will not get one." Good wound care helps, since slow healing and infection raise the odds. But keloids are mostly genetic, and careful care does not make a keloid-prone person keloid-proof.
- "Steroid injections thin the skin, so they are dangerous." Injections can leave a pale, thinned patch, and it shows more on deeper skin tones. A real side effect to discuss and dose for, not a reason to avoid treatment.
Questions Patients Ask
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Will my keloid ever go away completely?
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.
Can I get my ears pierced again if I have had a keloid?
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.
Why did I get one on my chest but not on my leg?
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.
Do steroid injections hurt, and how many will I need?
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.
Will the injection lighten my skin?
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.
I have a keloid and I need surgery for something unrelated. What should I do?
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.
References
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- Gold MH, McGuire M, Mustoe TA, et al. Updated international clinical recommendations on scar management: part 2--algorithms for scar prevention and treatment. Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]. 2014. — Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.], 2014
- Walsh LA, Wu E, Pontes D, et al. Keloid treatments: an evidence-based systematic review of recent advances. Systematic reviews. 2023. — Systematic reviews, 2023
- Zhang Y, Wu M, Liu D, et al. Recurrence and Complications of Peri-operative Steroid Injection of Keloids: A Systematic Review and Meta-analysis. Aesthetic plastic surgery. 2024. — Aesthetic plastic surgery, 2024
- Haji Mohammadi A, Seirafianpour F, Khosravi M, et al. A systematic review of comparative clinical trials on the efficacy, safety, and patient satisfaction of ablative and non-ablative laser therapies for atrophic, hypertrophic, and keloid scars. Lasers in medical science. 2025. — Lasers in medical science, 2025
- Bitterman D, Patel P, Wang JY, et al. Systematic review of dupilumab safety and efficacy for treatment of keloid scars. Archives of dermatological research. 2024. — Archives of dermatological research, 2024
- Tan A, Glass DA. Patient-reported outcomes for keloids: a systematic review. Giornale italiano di dermatologia e venereologia : organo ufficiale, Societa italiana di dermatologia e sifilografia. 2019. — Giornale italiano di dermatologia e venereologia : organo ufficiale, Societa italiana di dermatologia e sifilografia, 2019
