Key facts
- Hypertrophic scar
- Raised scar confined within the original wound boundary; tends to appear early and improve over 1–2 years
- Keloid
- Scar tissue extending beyond the original wound into normal skin; can start months late and keep growing
- Chronic inflammation
- Keloids behave as ongoing inflammation in the deep (reticular) dermis, not a finished scar
- High-tension sites
- Chest, shoulders, jawline, earlobes — skin tension and site strongly influence keloid risk
- Genetics
- Keloid tendency runs in families and is more common in Asian and African skin types
- Intralesional therapy
- Medication delivered directly into the scar — the backbone of keloid flattening
- Recurrence risk
- Excision alone can provoke a larger keloid; combination protocols exist to prevent exactly this
The one-line distinction
Draw the original wound in your mind — the cut, the piercing, the acne cyst, the BCG site. A hypertrophic scar is raised but honours that boundary. A keloid crosses it, spreading into skin that was never injured, often with a firm, sometimes itchy or tender advancing edge. Timing differs too: hypertrophic scars rise early and tend to soften over one to two years; keloids can begin months after the injury looked healed, and do not retire on their own. Ogawa's work frames keloids as chronic inflammation of the deep dermis — not a scar that finished badly, but a repair process that never stops.
“A keloid is not a scar that healed badly. It is a repair that never received the order to stop.”
Dr Sin YongOn why keloids need control, not just removal
Why you, and why there
Keloid risk is written partly in your genes — family history is common, and Asian and African skin types are over-represented — and partly in mechanics. Skin under constant tension scars hardest, which is why the chest, shoulders, upper back and jawline dominate keloid clinics, and why earlobes after piercing are the classic exception that proves the rule: low tension, but a confined inflammatory nidus. Acne along the jaw and chest deserves respect in keloid-prone patients, because every inflamed cyst is a potential keloid seed, and treating the acne is genuinely preventive scar medicine.
Why 'just cut it out' backfires
Excising a keloid and walking away hands the tissue a fresh wound plus the same genetics and the same tension that built the first one — and the recurrence is frequently larger than the original. This is the best-documented trap in scar surgery. Surgery still has a place, particularly for pedunculated earlobe keloids, but only inside a combination protocol where the fresh wound is defended: intralesional medication, pressure where applicable, and scheduled review. A keloid plan without a recurrence-prevention arm is not a plan.
What treatment honestly looks like
For most keloids the backbone is intralesional therapy — medication injected into the scar tissue itself in a series of sessions, softening and flattening it while the itch and tenderness settle. Silicone sheeting and pressure add slow, steady help. Vascular and fractional lasers address redness and texture as the bulk responds, and resistant or bulky keloids are managed with combination approaches tailored at assessment. Hypertrophic scars respond to the same tools faster and more gratefully. The honest framing for keloids is control rather than erasure: flat, pale, quiet and comfortable is an achievable outcome; 'gone without a trace' is not a promise anyone should make.
Living with the tendency
A keloid-former's future skin decisions should account for it: piercings and tattoos in high-risk zones deserve genuine hesitation, elective procedures should be planned with prophylaxis, and any new surgical wound in a risk site benefits from early scar management rather than a wait-and-see year. Tell every doctor who treats you that you form keloids. It changes technique, suture choice and follow-up — quietly preventing the scars that never form is the least visible, most valuable work in this field.
