Scar Classification · Recurrence Risk · CityLink Mall
A hypertrophic scar stays within the boundary of the original wound. A keloid does not — it grows outward into skin that was never injured — and that single difference changes the recurrence risk, the treatment sequence, and whether cutting it out is a reasonable idea at all.
Ordinary wound healing has an ending. Inflammation gives way to proliferation, fibroblasts lay down collagen to bridge the defect, and then remodelling begins — the disorganised type III collagen of early repair is gradually replaced by aligned type I collagen, the excess is broken down by matrix metalloproteinases, and the scar flattens and pales over roughly a year. Raised scars are what happens when the third phase never properly arrives.
In both keloids and hypertrophic scars, fibroblasts in the wound bed stay activated long past the point where they should have quietened. They continue producing collagen, and the enzymes that would normally degrade the surplus are outpaced or suppressed. The result is a scar with far more collagen than the defect required, bulging above the surface of the surrounding skin. Sustained inflammation keeps that loop running, which is why wounds under tension, wounds that became infected, and wounds that healed slowly are the ones that most often end up raised.
The two conditions diverge in how far that activity spreads. Hypertrophic scarring is contained — the overactive tissue respects the edge of the original injury and the scar, however thick, sits within the footprint of the wound that caused it. In a keloid the fibroproliferative process behaves invasively, recruiting fibroblasts in the surrounding dermis and extending claw-like into skin that was never cut. That is not a cosmetic distinction. It is the reason a keloid will not settle on its own and the reason a wider excision simply produces a wider keloid.
Genetics govern susceptibility more than anything a patient did or did not do. Keloids are substantially more common in darker Fitzpatrick skin types, frequently run in families, and cluster at sites with high skin tension and thick dermis — the sternum, the deltoid and shoulder, the upper back, the jawline and the earlobe after piercing. Someone who has formed one keloid should assume they will form another from the next comparable injury, and plan accordingly.
Classification
Patients describe both as a lump, and photographs alone rarely settle it. The question that decides the diagnosis is geometric: does the raised tissue stay inside the line of the original injury, or has it crossed it. The answer determines how the scar will behave over the next five years and how aggressively it needs to be managed.
Cutting out a keloid and doing nothing else is how a small keloid becomes a large one.
Management
A keloid removed surgically and closed without any adjunct treatment recurs in the great majority of cases, and the recurrence is often larger than the original — because the excision is itself a fresh injury in skin that has already demonstrated exactly how it responds to injury. This is the single most important thing to understand before agreeing to have one cut out. Surgery has a place in keloid management, but only inside a planned regimen that suppresses the fibroproliferative response afterwards, and only when the patient understands they are committing to months of follow-up rather than a single appointment.
The approaches that genuinely change raised scar tissue work by interrupting the mechanism rather than removing the bulk. Intralesional corticosteroid suppresses fibroblast activity and inflammation and softens the scar from within. Silicone, occlusion and pressure act on hydration and mechanical load. Vascular and fractional laser work reduces the vessel-rich redness and remodels collagen architecture in a controlled way. In practice these are combined and sequenced, not chosen between — and keloid treatment is measured in review appointments over a year rather than a course of three.
Timing also matters at the other end. If you are keloid-prone and are contemplating any elective procedure that breaks the skin — a piercing, a mole excision, a cosmetic incision — that susceptibility belongs in the conversation beforehand. It is far easier to manage a wound prophylactically from the day it closes than to treat an established keloid two years later. Atelier Aesthetics will say plainly where a scar is beyond what a non-surgical approach can achieve, or where the right next step is a plastic surgical referral.
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