Medically reviewed by Dr Sin Yong · Last reviewed · 16 min read · Doctor-performed, never delegated · Jump to questions
Dr Sin Yong · MBBS (NUS) · MRCS (Edin) · MSc Aesthetic Medicine with Distinction (Queen Mary, London) · MSc Practical Dermatology (Cardiff) · International KOL
A keloid grows past the edge of the wound that caused it. A hypertrophic scar does not. That single boundary decides almost everything that follows.
Keloid treatment in Singapore begins by confirming the lesion is a keloid rather than a hypertrophic scar, because a keloid grows beyond the original wound and tends to recur. First-line care is intralesional medical therapy, often combined with silicone, pressure, cryotherapy or laser and staged over time. Cutting a keloid out on its own is avoided.
Also called: raised scars, 疤痕疙瘩, 蟹足肿, ケロイド
Both a keloid and a hypertrophic scar are raised. Both can itch, ache and feel tight. To most people they look like the same problem.
They are not, and the difference is visible at the edge.
A hypertrophic scar stays within the margins of the original wound. It is raised, but it respects the outline of the injury that produced it, and over months to a couple of years it commonly flattens and softens without intervention.
A keloid does not respect that outline. It extends outward into skin that was never injured, and it characteristically does not regress on its own. A small piercing can produce a lesion many times the size of the original hole.
“A keloid grows past the edge of the wound that caused it. A hypertrophic scar does not. That single boundary decides almost everything that follows.”
Dr Sin YongOn distinguishing the two
Normal wound healing has a remodelling phase. Collagen laid down during repair is gradually reorganised and the scar settles back toward the level of the surrounding skin.
In a keloid, that phase does not conclude. Deposition of type I and type III collagen continues well past the point where healing should have finished, and the lesion expands rather than resolving.
Genetic susceptibility is a major factor, which is why keloids frequently run in families — and why a family history is worth mentioning at consultation even if you have never formed one yourself.

Keloid formation is substantially more common in people of Chinese, Malay, Indian and African descent than in those with white European skin.
In Singapore's population this makes keloid a routine presentation rather than an unusual one — and it is why keloid history is asked about before any procedure that breaks the skin, including treatments elsewhere on this site.
Common sites follow skin tension: earlobes after piercing, the upper chest, the shoulders, the upper back and along the jawline. Keloids also arise on surgical scars, burns and acne lesions — which is where this overlaps with acne scar treatment, though the two are managed differently.
It is the first thing most people ask, and it deserves a direct answer.
Excision alone carries a high recurrence rate, and a recurrent keloid is frequently larger than the one that was removed — because the excision itself is a fresh wound in skin already prone to abnormal healing.
Where surgery has a role at all, it is combined with adjuvant treatment rather than performed on its own. Anyone offering straightforward removal without discussing what follows it is not describing the problem accurately.
Intralesional medical therapy is first-line, sometimes in combination. These require assessment, monitoring and a discussion of side effects before any course begins.
Adjuncts are selected by site, by how old the lesion is, and by how it has responded to anything tried previously: pressure therapy, silicone, cryotherapy, and laser directed at the vascular and textural components.
Plans are usually combined rather than single-modality, and they are staged over time rather than completed in one visit.
Keloids have a genuine tendency to recur. Any honest conversation includes that from the beginning rather than after.
Treatment is directed at flattening, softening and controlling symptoms — the itch, the tenderness, the tightness across a joint or the neck. For many patients those symptoms, not the appearance, are what brings them in.
Ongoing review is frequently part of the plan. What is realistic in your case is discussed at assessment.
Response varies with the size, site and age of the lesion, skin type, genetic factors and previous treatment. Not every keloid is suitable for every approach, and suitability is assessed in person.
Keloids vary widely between patients, so cost follows the plan rather than a fixed list. Four things shape it:
A figure quoted before assessment would not reflect your presentation. Cost is set out clearly at consultation, before anything is agreed.
| Option | What it does | What it cannot do | Typical recovery | Who it tends to suit |
|---|---|---|---|---|
| Intralesional medical therapy | Medicine placed into the keloid to soften and flatten it and to settle itch and tenderness | Remove the underlying tendency to form keloids, or prevent recurrence on its own | Local tenderness; possible thinning or lightening of nearby skin, discussed before a course begins | Most keloids, as the first-line approach, often alongside an adjunct |
| Silicone gel or sheeting | Hydrates and covers the scar surface to help soften and flatten raised scar tissue | Reduce a large, established keloid by itself | No procedural recovery; needs consistent daily use | Small or early lesions, and maintenance after other treatment |
| Pressure therapy | Applies sustained pressure to the scar, for example with pressure earrings after an earlobe keloid is treated | Work where even pressure cannot be applied | No procedural recovery; depends on consistent wear | Earlobe keloids, particularly after treatment |
| Cryotherapy | Freezes the lesion to reduce its bulk, sometimes combined with intralesional therapy | Avoid lightening of the treated skin, which is more noticeable in darker skin | Blistering and crusting that heal over time | Smaller keloids at sites where freezing is practical |
| Laser | Targets the redness and surface texture of the scar | Flatten a bulky keloid on its own | Transient redness or bruising, depending on the laser | Red or textured keloids, as an adjunct to medical therapy |
| Surgical excision with adjuvant treatment (referred to a plastic surgery specialist) | Removes the bulk of the keloid, followed by adjuvant treatment to reduce the chance of return | Be relied on alone, because excision without adjuvant treatment frequently recurs, often larger | Wound healing and follow-up guided by the operating team, with adjuvant treatment afterwards | Selected large keloids that have not responded to non-surgical treatment |
People who expect a keloid to be cut out and gone, or who cannot attend ongoing review, tend to respond poorly, as keloids are managed over time.
Expected effects of treatment include local tenderness, swelling, redness and bruising at the treated site, and with cryotherapy, blistering and crusting that heal over time. Less commonly there can be thinning or lightening of the nearby skin, which is more noticeable in darker skin, or transient redness after laser. A keloid can also return or regrow despite treatment, which is why review is built into the plan and why the tendency to recur is discussed from the start. Response varies with size, site, age of the lesion, skin type, genetics and earlier treatment. Risks are explained before a course begins.
The fee depends on the size and number of lesions, since a single earlobe keloid differs from extensive chest involvement, and on the site, which affects what is appropriate and how it is delivered. It also depends on which modalities the assessment indicates, the medicines and consumables involved, and how the plan is staged with review. A written quote is given at consultation after assessment. The consultation also decides whether treatment is advised at all.
How quotes work at this practice: how we quote.
Excision alone frequently recurs, often larger, because the cut is a fresh wound in skin prone to abnormal healing.
A keloid grows beyond the wound edge and does not regress on its own, while a hypertrophic scar stays within it and often flattens.
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A keloid extends beyond the boundary of the original wound into surrounding normal skin. A hypertrophic scar is raised but stays within the original wound margins. Hypertrophic scars often flatten over months to a couple of years; keloids characteristically do not regress on their own. The distinction is made on examination and it decides the approach, because the two behave differently.
A keloid represents an abnormal, prolonged wound-healing response with excess deposition of type I and type III collagen. Rather than the normal remodelling phase bringing the scar back toward the skin surface, collagen production continues and the lesion expands. Genetic susceptibility is a major factor, which is why keloids often run in families.
Yes. Keloids are substantially more common in individuals of Chinese, Malay, Indian and African descent than in those with white European skin. In Singapore's population this is a common presentation, and it is one reason keloid history is asked about before any procedure that breaks the skin.
Earlobes after piercing, the upper chest, the shoulders, the upper back and along the jawline. These are sites of relatively high skin tension. Keloids also form on surgical scars, burns, acne lesions and sometimes at vaccination sites.
Excision alone has a high recurrence rate, and a recurrent keloid is frequently larger than the original. Surgery, where it is appropriate at all, is combined with adjuvant treatment rather than performed on its own. This is one of the more important things to understand before agreeing to removal.
Intralesional medical therapy is first-line, sometimes in combination. These require assessment and monitoring. Pressure therapy, silicone, cryotherapy and laser are used as adjuncts depending on the site, the age of the lesion and how it has responded previously. Plans are usually combined rather than single-modality.
Keloids have a genuine tendency to recur, and any honest discussion includes that. Treatment aims at flattening, softening and symptom control rather than a promise that the keloid will not return. Ongoing review is often part of the plan, and that is discussed openly at consultation rather than after.
Frequently. Itch, tenderness, a burning or stinging sensation, and restriction of movement where a keloid crosses a joint or the neck. For many patients the symptoms rather than the appearance are the reason they seek assessment.
A personal or family history of keloid formation is relevant to any procedure that breaks the skin, and it is asked about before treatment here. It does not rule everything out, but it changes what is advisable and how a procedure is planned.
Cost depends on the size and number of lesions, the site, which modalities the assessment indicates, and how the plan is staged over time. Because keloids vary so widely between patients, a figure quoted before assessment would not be meaningful. Cost is set out clearly at consultation.
Not on its own. Laser is used as an adjunct: it can reduce the redness of an active keloid and improve surface texture, but it does not flatten a bulky lesion by itself. It is usually combined with intralesional medical therapy and other measures chosen for the site and the age of the keloid.
A keloid usually follows an injury, piercing, acne spot or surgery and spreads beyond the edge of that wound. A lump that appeared without any injury, grows quickly, bleeds, ulcerates or looks different from your other scars should be examined before it is treated as a keloid, because other skin growths can look similar. A biopsy is occasionally needed to confirm the diagnosis.
Injections into a keloid are uncomfortable because the scar tissue is dense, and cryotherapy stings while the area is frozen. Discomfort varies with the site and the size of the lesion, and comfort measures are discussed before treatment. Silicone and pressure therapy involve no procedure.
The cost of keloid treatment in Singapore depends on the size and number of lesions, the site, the modalities the assessment indicates, the medicines and consumables involved, and how the plan is staged with review. A written quote is given at consultation, after Dr Sin Yong has examined the scar. The consultation also decides whether treatment is advised, so no figure is given in advance.
It can be worthwhile for people whose keloid itches, aches, feels tight or affects daily life, and who accept that the aim is flattening, softening and controlling symptoms, with a real tendency to recur. It is less suitable for anyone expecting a keloid to be cut out and gone, or unable to attend ongoing review.
How long the effect of keloid treatment lasts depends on the size, site and age of the lesion, skin type, genetic factors and earlier treatment, and keloids have a genuine tendency to recur. No duration is promised. Ongoing review is often part of the plan, and its timing is set at consultation after the scar has been examined.
Disadvantages include a tendency for keloids to return, a plan that is staged and reviewed over time instead of finished in one visit, and local tenderness, swelling or bruising. Thinning or lightening of nearby skin can occur, more noticeably in darker skin. Not every approach suits every keloid, and excision alone is avoided because it often recurs larger.
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Keloid — StatPearls. National Center for Biotechnology Information. source
Medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last updated 7 October 2026 · Editorial policy
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