How a Scar Treatment Plan Is Built: Raised, Depressed or Keloid Scars Need Different Methods

The appendectomy was eight months ago, and the surgeon said it went well. Yet the scar across the lower abdomen has done the opposite of fading. It has thickened into a rope, itches at night and has started to creep a few millimeters beyond the original cut. A friend who had a cesarean says her scar simply turned into a thin silver line. Same kind of skin, same kind of knife, two completely different outcomes.

That gap is where a scar treatment plan begins. Dermatologists and plastic surgeons do not ask “what cream should we use?” as the first question. They ask what kind of scar this is, how old it is, where it sits on the body and what the skin around it tends to do when injured. The answers decide almost everything that follows.

This explainer walks through how clinicians sort scars into raised, keloid and depressed categories, why each category pulls the plan in a different direction, and what the evidence honestly supports at each step.

Why a scar treatment plan never starts with a product

Scar care is sold as a shopping problem. Walk down any pharmacy aisle and the message is that the right tube fixes the mark. Clinicians see it differently. The NHS describes scars as part of the normal healing process, and notes that most will flatten and fade over roughly two years without any intervention at all. A plan therefore starts by deciding whether treatment is needed, then matching the method to the scar’s biology.

Three questions drive that first consultation. First, is the scar raised, flat or sunken? Raised scars are made of too much collagen; sunken scars have too little tissue beneath them. No single method can both remove bulk and rebuild volume. Second, how old is the scar? A red, firm scar at three months is still remodeling and may settle on its own; the same appearance at eighteen months is far less likely to change without help. Third, what does this person’s skin do when it is injured? Someone with a family history of keloids, or a previous keloid on the chest or earlobe, is planned for very differently from someone whose earlier scars all faded.

Location matters more than most people expect. The Mayo Clinic notes that keloids favor the chest, shoulders, earlobes and cheeks, areas with high skin tension or frequent stretching. Scars that cross a joint can tighten and limit movement, which turns a cosmetic concern into a functional one and changes the urgency of the plan.

Only after those answers are in hand does a clinician talk about silicone, injections, lasers or surgery. The method is the last step, not the first.

What actually happens in the skin when a scar forms

A scar is the skin’s repair patch. When the dermis, the thicker living layer under the surface, is cut or burned, the body cannot regrow the original woven architecture. Instead it lays down collagen, a structural protein, in a quicker, more parallel pattern. That difference in weave is why a scar looks and feels unlike the skin around it.

Healing moves through overlapping phases. In the first days, bleeding stops and inflammatory cells clear debris and bacteria. Over the following weeks, fibroblasts, the cells that manufacture collagen, migrate in and build new tissue while tiny blood vessels sprout to feed it. This is why fresh scars look pink or red: they are literally full of new vessels. Then comes remodeling, the long phase in which collagen is broken down and rebuilt into a more orderly form while excess vessels close off. The Cleveland Clinic and NHS both describe this maturation as taking many months to about two years.

Problem scars arise when the balance tips. Too much collagen production, or too little breakdown, produces a hypertrophic scar or a keloid. Too much destruction of the dermis with too little rebuilding, as happens in inflamed acne or chickenpox, leaves a depressed scar. Pigment cells can also be lost or overstimulated along the way, which is why some scars end up paler and others darker than the surrounding skin.

Understanding this sequence explains the timing rules clinicians follow. Interventions aimed at calming collagen overproduction work best during active remodeling. Procedures that resurface or lift a depressed scar are usually planned once healing is quiet, so the treatment does not fight an ongoing inflammatory process.

Hypertrophic scar vs keloid: how clinicians tell raised scars apart

Both hypertrophic scars and keloids are raised, firm and often itchy, which is why they are so often confused. The distinction is not academic. It changes the plan, the expected timeline and the risks of certain procedures.

A hypertrophic scar stays within the boundaries of the original wound. It typically appears within the first couple of months after injury, may redden and thicken for a while, and then, according to the Mayo Clinic, often flattens and fades over time even without treatment. It is common after burns, surgical incisions under tension and wounds that took a long time to close.

A keloid grows beyond the original wound edges into skin that was never injured. The NHS notes that keloids can develop after very minor skin damage, including acne spots, piercings and insect bites, and can keep growing for months or years. They rarely regress on their own. Keloids run in families and are more common in people with Black, Asian or Hispanic ancestry, a point both the NHS and Mayo Clinic make clearly.

Clinicians also look at behavior over time. A raised scar that peaked at six months and is slowly softening is behaving like a hypertrophic scar. A scar that is still expanding at twelve months, or that appeared long after the wound had closed, is behaving like a keloid. Some centers use ultrasound or simply careful serial photographs to track this.

The practical consequence is stark. Surgical removal is a reasonable option for a mature hypertrophic scar in the right setting. For a keloid, the Mayo Clinic cautions that surgery alone frequently triggers regrowth, sometimes larger than before. The same scalpel is a tool in one plan and a hazard in the other.

How to treat depressed scars starts with understanding why skin sinks

Depressed scars, also called atrophic scars, sit below the level of surrounding skin. They are the typical legacy of inflammatory acne and chickenpox, and they can also follow surgery or injury where fat under the skin was lost.

The mechanism is tissue deficit. Inflammation destroys collagen and sometimes the fat layer beneath the dermis, and the repair that follows does not refill the gap. The Cleveland Clinic describes several acne scar shapes that clinicians name because the shape guides treatment. Ice pick scars are narrow and deep, like a puncture. Boxcar scars are wider with sharp vertical edges. Rolling scars are broad and shallow with sloping edges, and are often tethered to deeper tissue by fibrous bands that pull the surface down.

Each shape calls for a different tool. A scar that is pinned down by a band under the skin will not respond to surface treatment alone; the band has to be released, a technique known as subcision, in which a fine needle is passed beneath the scar to cut the tether. A deep, narrow ice pick scar may be addressed by punch excision, in which the scar is removed as a tiny cylinder and the edges closed, or by applying a controlled chemical to the base. Broad, shallow scars are more suited to resurfacing methods such as fractional laser or microneedling, which create controlled micro-injuries that stimulate new collagen in the dermis. Dermal fillers, injectable gels that add volume, can lift a depressed area temporarily.

Most plans for depressed scars combine two or three of these over several sessions. Expectations are set carefully: the goal is to soften contours and reduce shadowing, not to erase the scar. Clinicians also check that acne itself is controlled first, because treating scars while new ones are forming is a losing race.

Scar types compared: what the plan usually looks like for each

The table below summarizes how the main scar types differ and which methods are typically considered. It is a map of the territory, not a prescription; the right combination for any individual depends on assessment by the treating team.

Scar type	Key features	Natural course	Methods commonly considered
Hypertrophic	Raised, red or pink, firm, stays within wound edges	Often flattens and fades over months to about 2 years (NHS, Mayo Clinic)	Silicone gel or sheets, pressure therapy, corticosteroid injection, vascular or fractional laser, surgical revision once mature
Keloid	Raised, grows beyond wound edges, may itch or hurt, can keep enlarging	Rarely regresses on its own	Corticosteroid injection, cryotherapy, silicone and pressure, laser; surgery only combined with other measures to reduce regrowth (Mayo Clinic)
Depressed (atrophic)	Sunken, may be narrow and deep or broad and shallow, sometimes tethered	Permanent without treatment, may become more visible as skin ages	Subcision, punch excision, fractional laser, microneedling, chemical peels, dermal fillers
Flat but discolored	Level with skin, pink, brown or pale	Redness usually fades over 1–2 years; pigment change may persist	Sun protection, time, pigment-targeted laser in selected cases, camouflage
Contracture	Tight scar that limits movement, often after burns	Can worsen as scar matures	Physiotherapy, pressure garments, splinting, surgical release or grafting

Two patterns stand out. Methods that calm collagen overproduction, such as silicone and corticosteroid injection, appear in the raised rows but have no role in depressed scars. Methods that provoke new collagen, such as microneedling and fractional resurfacing, appear in the depressed row and would be counterproductive for an active keloid. That is the core reason one plan cannot serve every scar.

Building a scar treatment plan for raised hypertrophic scars

Hypertrophic scars are, in many ways, the most forgiving category, because their natural tendency is to improve. The plan therefore leans toward conservative measures first and holds procedures in reserve.

Silicone is usually the opening move. Silicone gel sheets or topical silicone gel are thought to work by hydrating the scar surface and reducing water loss, which in turn appears to dampen the signals that drive fibroblasts to keep producing collagen. The NHS advises that silicone sheets or gel should be used for 12 hours a day for at least 3 months to have a reasonable chance of effect. Evidence quality is moderate rather than strong, but silicone is low-risk and widely recommended by mainstream guidance.

Pressure therapy is the second pillar, especially after burns. Elastic garments compress the scar continuously, which is believed to limit blood flow and collagen deposition. The NHS notes that pressure dressings are usually worn for 6 to 12 months and are typically fitted by specialist burn or scar services.

When a scar stays thick and symptomatic despite these measures, corticosteroid injection into the scar is commonly considered. A corticosteroid is an anti-inflammatory medicine; injected directly into scar tissue it reduces inflammation and slows collagen production, and it often eases itch. The course and spacing are set by the clinician based on how the scar responds, and side effects can include thinning of nearby skin and lightening of pigment.

Lasers add precision. A vascular laser targets the extra blood vessels that keep a scar red; fractional lasers create microscopic columns of injury to encourage remodeling. Surgical revision, in which the scar is excised and reclosed with less tension, is reserved for mature scars and is usually paired with silicone or pressure afterward so the new scar does not repeat the old one.

Keloid scar treatment options: why surgery alone is rarely the plan

Keloids behave less like scars and more like a benign overgrowth that refuses to switch off. Any plan has to respect that, which is why the first principle in keloid care is to avoid provoking the skin further.

Prevention sits at the top. The NHS advises people who know they form keloids to avoid piercings, tattoos and non-essential surgery, and to tell any surgeon about their history before a planned operation so incisions can be placed and closed with minimal tension. For a keloid that already exists, the Mayo Clinic lists several approaches that are usually combined rather than used alone.

Corticosteroid injection into the keloid is the most widely used first-line treatment. It softens and flattens many keloids and relieves itch, though it rarely removes them entirely and results vary considerably. Cryotherapy, the application of extreme cold to freeze tissue, is used for smaller keloids and sometimes alongside injections. Silicone and pressure, including pressure earrings for earlobe keloids, help maintain gains. Laser therapy may reduce redness and thickness.

Surgery occupies a cautious place. Cutting out a keloid creates a new wound in skin that has already proven it over-reacts, and the Mayo Clinic notes that keloids frequently return after excision alone, sometimes larger. For that reason, when surgery is chosen, it is almost always paired with something to suppress regrowth, such as injections, pressure or, in selected adults, a short course of low-dose radiotherapy to the wound. Each of those additions carries its own risks, which the treating team weighs against the keloid’s size, location and symptoms.

Honest framing matters here. Keloid treatment aims to control the scar, reduce symptoms and improve appearance. No mainstream guideline promises permanent removal, and a plan that implies otherwise should prompt questions.

Who is usually offered scar treatment and who is asked to wait

Not every scar that bothers someone is ready for treatment, and not every method suits every person. Clinicians think in terms of timing, skin behavior and overall health.

People commonly offered active treatment include those with raised scars that are still thickening or symptomatic after several months, those with keloids that itch, hurt or are enlarging, those with scars that restrict movement across a joint, and those with mature depressed scars once the underlying condition such as acne is under control. Scars in highly visible areas, or scars causing real distress, are also reasonable to address once the biology allows.

Several groups are usually asked to wait or to proceed more slowly. Fresh surgical scars under about three months are often still remodeling, and the NHS notes that appearance can keep improving for up to two years; resurfacing a scar that is going to flatten anyway exposes someone to risk for little gain. People with active acne or active skin infection near the scar are typically treated for that first. Anyone who has recently taken oral retinoid medicine for acne is usually asked to defer resurfacing procedures, because retinoids alter skin healing; the interval is set by the prescribing clinician. People with very dark or very fair skin are not excluded, but laser and peel settings and the choice of device are adjusted to reduce the risk of pigment change, and some methods may be avoided altogether.

Medical factors also shape eligibility. Poorly controlled diabetes, smoking, blood-thinning medicines and conditions that impair healing all raise the risk of a procedure making a scar worse. Pregnancy generally postpones elective scar work. None of these are absolute bars; they are reasons for a conversation in which the treating team decides what is safe and sensible.

What the following weeks and months usually look like

Scar treatment is a slow discipline. Whatever the method, the skin responds on its own schedule, and plans are built around that reality rather than against it.

After starting silicone or pressure, little visible change is expected in the first weeks. The NHS timeframe of at least three months of daily silicone use reflects how long collagen remodeling takes to show on the surface; many clinicians review at that point and decide whether to continue or add another method. Pressure garments for burn scars are typically worn for 6 to 12 months and refitted as swelling settles.

Corticosteroid injections cause soreness and sometimes bruising for a few days. Softening of the scar is usually assessed over the following weeks before any repeat is considered, and the series may run across several months. Temporary lightening of skin at the injection site can appear and may take months to even out.

Laser and microneedling sessions leave the area red, swollen and tender for several days, with fine crusting or peeling as the surface renews. Visible improvement in texture builds gradually over the next two to three months as new collagen matures, which is why most plans schedule a course of sessions spaced weeks apart rather than a single visit. Strict sun protection during this period is standard, because treated skin pigments easily.

Surgical revision produces a fresh wound that will itself be red and raised for a time before settling. The new scar follows the same roughly two-year maturation curve as any other, and silicone or pressure usually begins once the incision has fully closed. Patience is not a platitude here; a scar judged at six weeks after revision tells almost nothing about its final appearance.

When do scars turn white, and what the color is telling you

Scar color is a clock. Reading it well helps both patients and clinicians judge where a scar is in its journey and what, if anything, is still likely to change.

Fresh scars are pink or red because the healing tissue is rich in new blood vessels. As remodeling proceeds and those vessels close down, the redness fades. The NHS describes this fading as occurring gradually over up to two years. For many people the end point is a scar paler than the surrounding skin, sometimes described as white or silvery. The pallor has two causes: fewer blood vessels in the mature scar, and fewer or less active pigment-producing cells, since melanocytes do not always repopulate scar tissue well.

That pale end point is generally permanent. Once a scar has turned white, the window for treatments that target redness has passed, and the plan shifts toward texture, if it is raised or depressed, or toward camouflage and sun protection if it is flat. Lasers that address pigment loss exist but results are modest and variable, and mainstream sources are candid about that.

Some scars go the other way and darken. Post-inflammatory hyperpigmentation, excess pigment deposited during healing, is more common in medium and dark skin and is strongly worsened by sun exposure. Unlike pallor, darkening often fades over months, and sun protection speeds that along.

Why this matters for planning: a red scar is still active, and conservative measures may yet work on their own; a scar that has gone pale and soft is mature, and only its shape remains on the table. A scar that is still red and growing well past a year is behaving like a keloid and deserves specialist review.

Is vitamin C good for scars, and what about scar creams for children?

These are two of the most searched scar questions, and both deserve a straight answer rather than a reassuring one.

Vitamin C has a genuine role in healing. The NIH Office of Dietary Supplements explains that ascorbic acid is an essential cofactor for the enzymes that stabilize collagen, and that deficiency impairs wound healing and can reopen old scars in severe cases. That is a statement about having enough vitamin C in the body, met for most people through an ordinary diet. It does not follow that applying vitamin C to a scar, or taking extra beyond normal needs, produces a better scar. Evidence for topical vitamin C improving established scars is limited to small studies with mixed results, and no major guideline recommends it as a scar treatment. A clinician will not object to a well-formulated vitamin C serum on healed skin, but it should not displace measures with better support.

On creams for children, the honest position is that no over-the-counter product has been shown in good-quality trials to outperform simple measures. What does matter for a child’s scar is keeping the wound clean while it heals, never applying products to open or weeping skin, protecting the healed area from sun with clothing or a pediatric sunscreen, and gentle moisturizing to reduce itch and picking. The NHS lists silicone gel as a reasonable option for raised scars and it is generally considered safe on healed skin in children, but its use should be guided by the child’s clinician, particularly for burns, which are managed through specialist services. Vitamin E, onion extract and other popular ingredients lack convincing evidence and vitamin E in particular can cause contact dermatitis.

Parents often ask whether starting early is critical. Early care means wound care; scar-specific treatment waits for closure.

What people often get wrong about scar treatment

Scar folklore is remarkably durable. Correcting a few of the most common beliefs saves money, time and occasionally skin.

“Scars can be removed.” They cannot. Every treatment, including surgery, replaces one scar with another that is hopefully flatter, finer or better placed. Marketing that promises removal is describing something that does not exist in dermatology.

“The sooner you treat it, the better.” True for wound care, misleading for scar procedures. Most scars improve on their own over the two-year maturation period the NHS describes, and resurfacing an immature scar can worsen it. The right moment is specific to the scar type.

“Keloids should be cut out.” The Mayo Clinic is explicit that surgery alone commonly leads to regrowth. Excision has a role only as part of a combined plan.

“Massaging with vitamin E or oils fades scars.” Gentle massage can soften a scar and relieve tightness, and moisturizing eases itch, but the active ingredient matters little; the evidence for vitamin E is poor and it sometimes causes rashes. The massage, not the oil, is doing any work.

“A scar that is still red at a year has failed to heal.” Redness commonly persists well into the second year. Persistence alone is not alarming; growth beyond the wound edges is.

“Sun helps scars blend in.” The opposite. Ultraviolet exposure darkens healing scars and can fix pigment change permanently, which is why every mainstream source stresses sun protection for at least the first year.

“One session will do it.” Laser, microneedling and injection plans almost always involve several visits over months, because collagen remodels slowly.

The thread running through all of these is the same: scars reward patience and the right method, not speed and the strongest product.

Questions to ask your care team before agreeing to a plan

A good scar consultation should leave you able to explain your own plan to someone else. These questions help get there, and the answers will tell you a great deal about how carefully the plan has been built.

• What type of scar is this, in your assessment, and what features make you confident about that?
• How mature is the scar, and would waiting change what you recommend?
• What is the realistic goal: flatter, softer, less red, less visible, more mobile? Which of those is most achievable for this scar?
• Why this method first, and what is the next step if it does not work?
• How many sessions or how many months are typically involved, and when will we review progress?
• What are the specific risks for my skin type, including pigment change, and how do you reduce them?
• If injections are part of the plan, what side effects should I watch for at the site?
• If surgery is suggested, what will be done to stop the new scar behaving like the old one?
• For a keloid, how likely is regrowth after this approach, and what is the plan if it recurs?
• Are there medicines, supplements or health conditions I should mention that could affect healing?
• What should I do about sun protection, massage and daily care between visits?
• What signs would mean I should contact you before the next appointment?

Write the answers down. Scar plans unfold over months, and the reasoning behind each step is easy to forget by the time the next decision arrives. A team that welcomes these questions is one that is thinking about your skin rather than a protocol.

When to call your doctor about a scar

Most scars are a cosmetic concern that can wait for a routine appointment. A few situations call for prompt contact with a doctor, whether the scar is untreated or in the middle of a treatment plan.

Seek care without delay if a scar or treated area becomes increasingly red, hot, swollen or painful, starts to ooze pus or fluid, or if you develop a fever. These are signs of infection, which can set back healing and worsen the final scar. Spreading redness that tracks away from the wound, or red streaks along the skin, should be assessed the same day.

Contact your doctor if a scar opens up, bleeds, or breaks down after having healed, especially after a procedure or injection. Also report any scar that is tightening and limiting movement of a joint, neck or eyelid, since early physiotherapy or surgical review can prevent a permanent contracture.

A scar that keeps growing beyond its original edges, particularly past the first year, or that becomes hard, lumpy or painful without an obvious cause, deserves specialist review to confirm it is a keloid and not something else. Any change in a long-standing scar, such as a new nodule, ulceration, irregular pigment or persistent itch and crusting, should be examined, because skin cancers can occasionally arise in old scars, particularly burn scars.

During treatment, call if you notice marked thinning or indentation of skin at an injection site, blistering or prolonged dark or light patches after laser, or an allergic-type rash under silicone or dressings. Severe, worsening pain that is not relieved by the measures your team suggested is always a reason to get in touch. When in doubt, the treating team would rather hear from you early than see a complication late.

Frequently asked questions

What is the most effective treatment for reducing scars?

There is no single most effective treatment, because the right method depends on scar type. Raised hypertrophic scars respond to silicone, pressure and corticosteroid injection; keloids need combined approaches; depressed scars call for subcision, resurfacing or fillers. Mainstream sources such as the NHS and Mayo Clinic describe these as options to be matched to the individual scar, not ranked universally. A clinician’s assessment of type, age and location is the real starting point.

Is vitamin C good for scars?

Vitamin C is necessary for the body to build collagen, and deficiency impairs wound healing, as the NIH Office of Dietary Supplements explains. That does not mean applying vitamin C to a scar improves it. Evidence for topical vitamin C on established scars is limited and mixed, and no major guideline recommends it as a scar treatment. Eating a normal diet covers the body’s need; scar-specific measures with better support come first.

What is the best scar cream for kids?

No over-the-counter scar cream has been shown in good-quality trials to outperform basic care for children. What helps is keeping the wound clean until it closes, protecting the healed area from sun, moisturizing to reduce itch, and discouraging picking. Silicone gel is considered a reasonable option for raised scars once skin has healed, but a child’s clinician should guide its use, particularly after burns or surgery.

When do scars turn white?

Scars usually turn pale or white toward the end of maturation, which the NHS describes as taking up to about two years. The redness of a fresh scar comes from new blood vessels; as these close and pigment cells fail to fully repopulate, the scar becomes lighter than surrounding skin. This pallor is generally permanent. A scar that is still red and growing well past a year should be reviewed.

What is the difference between a hypertrophic scar vs keloid?

A hypertrophic scar is raised but stays within the original wound boundaries and often flattens over time. A keloid grows beyond the wound edges into uninjured skin, can appear months after the injury, and rarely shrinks on its own. Keloids run in families and are more common in people with darker skin. The distinction matters because surgery alone frequently makes keloids regrow, while it can be appropriate for mature hypertrophic scars.

What are the main keloid scar treatment options?

Corticosteroid injection into the keloid is the most common first-line approach, often combined with cryotherapy, silicone, pressure or laser. Surgery is usually avoided on its own because keloids tend to return after excision; when used, it is paired with injections, pressure or sometimes radiotherapy to reduce regrowth. The aim is to control size and symptoms rather than remove the keloid permanently, and the plan is set by a specialist.

How to treat depressed scars from acne?

Depressed acne scars are treated according to shape. Rolling scars tethered by fibrous bands are released with subcision; narrow ice pick scars may be removed by punch excision or treated at the base; broad boxcar scars suit fractional laser, microneedling or chemical peels. Fillers can temporarily lift sunken areas. Most plans combine methods over several sessions, and active acne is controlled first so new scars do not keep forming.

How long does it take for scar treatment to work?

Scar treatment is slow because collagen remodels over months. The NHS advises silicone for at least 3 months before judging effect, and pressure garments for 6 to 12 months after burns. Laser and microneedling results build over two to three months after each session. Surgical revision creates a new scar that follows its own two-year maturation. Reviews are scheduled at intervals rather than expecting change after a single visit.

Can a scar be completely removed?

No. Every scar treatment, including surgery, replaces the existing scar with a new one that is hoped to be flatter, finer, less red or better placed. The skin cannot regrow its original architecture once the dermis has been cut. Realistic goals are improved texture, color, comfort and mobility. Any claim of complete removal is not supported by mainstream medical evidence and should prompt careful questions.

Should I treat a scar as soon as the wound heals?

Early care means good wound care: keeping it clean, closed and protected from sun. Scar-specific procedures usually wait, because most scars improve on their own over the two-year maturation the NHS describes, and resurfacing an immature scar can worsen it. Conservative measures such as silicone may start once the skin has fully closed. Scars that are thickening rapidly or growing beyond their edges should be assessed sooner.

References

• NHS: Scars
• NHS: Keloid scars
• Cleveland Clinic: Scars
• MedlinePlus: Keloids

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.