In short. Scar revision improves a scar rather than erasing it, so here is how normal, widened, hypertrophic and keloid scars differ, what each technique can offer, and the risks involved.
Key points
- Operating on a scar that is still maturing usually makes it worse.
- Most surgeons wait until it stops changing, unless function is being lost.
Scar revision is one of the most misunderstood operations in plastic surgery. It is not a scar removal. A scar is a permanent record of an injury or an incision, and no operation can delete it. What revision can do is exchange one scar for a better one: longer, thinner, flatter and better aligned to the lines of the skin. Whether that trade is worth it depends on the scar and your expectations.
First, name the scar correctly
Treatment follows diagnosis. A normal scar matures over months, becoming flatter and paler on its own. A widened scar is broad and flat, the result of tension during healing. A hypertrophic scar stays within the boundaries of the original wound, is raised, and is often red and itchy, and it tends to improve with time. A keloid grows beyond the original wound edges and can recur after removal. These behave differently; a technique that helps one may worsen another. Getting the label right is the first step.
Techniques, and what each is for
Surgical re-excision removes the old scar and closes the skin again in layers, with attention to tension. Z-plasty and W-plasty rearrange the scar into a different shape so tension no longer pulls across it. Geometric broken line closure breaks a long straight scar into irregular segments. Contracture release lengthens a scar that has shortened and is restricting movement. Resurfacing treats surface irregularity rather than the scar as a whole. Alongside surgery, adjuncts are used: silicone gel or sheeting, pressure, intralesional injections, laser treatment, and above all, time.
Timing is part of the technique
Operating on a scar that is still maturing usually makes it worse. Most surgeons wait until it stops changing, unless function is being lost.
What revision realistically achieves
The honest description is a trade. You exchange a scar you dislike for a longer, thinner, better-oriented one. It will usually be less noticeable, but it will still be visible on close inspection. The improvement can be worthwhile for a wide, tethered or badly aligned scar, but it is an improvement, not an erasure.
Risks stated plainly
Any operation carries the risk of bleeding, infection and a reaction to sutures. Specific to scar revision, the scar can widen again, a keloid can recur, pigment can spread or be lost around the new scar, and there is a real chance that the result is no better than the scar you started with. Sometimes it can be worse. These risks are part of the decision.
Deciding, including deciding not to
A considered decision may be to leave the scar alone. Many scars continue to improve for a year or more without surgery, and camouflage, silicone and time are legitimate options. If you do proceed, choose a surgeon who will explain the trade honestly, describe what is realistic, and accept that declining surgery is a reasonable outcome.
Seek surgical review promptly if
- A scar keeps growing beyond its original outline, or returns after removal.
- A scar restricts movement, pulls on a nearby feature, or breaks down and ulcerates.
- A long-settled scar becomes painful, bleeds, or changes in size or colour.
Frequently asked questions
How does a hypertrophic scar differ from a keloid?
A hypertrophic scar stays within the boundaries of the original wound, is raised, often red and itchy, and tends to improve with time. A keloid grows beyond the original wound edges and can recur after removal. They behave differently, and a technique that helps one may worsen the other.
How long should I wait before considering scar revision?
Until the scar stops changing. Operating on a scar that is still maturing usually makes it worse, and many scars keep improving for a year or more without surgery. Most surgeons wait, unless function is being lost.
What does scar revision realistically achieve?
A trade. You exchange a scar you dislike for a longer, thinner, better-oriented one that will usually be less noticeable but still visible on close inspection. There is a real chance the result is no better than the scar you started with, and sometimes it can be worse.
Risks & Limitations
- Reconstruction is usually staged — more than one operation is normal, and the plan may change as healing progresses.
- Donor-site scarring and discomfort, including after rib cartilage harvest.
- Partial or complete failure of a flap or graft, which may require further surgery.
- Scars are permanent. They mature and fade but never disappear.
- Asymmetry and the inherent limits of matching a normal side.
- Altered sensation, numbness or weakness in the operated area.
- Contracture, which may need release procedures later.
- Final assessment is made at 6–12 months, and longer in growing children.
When to Seek Care
- A flap or graft that turns dark, cold, black or stops bleeding when pricked.
- Fever above 38 °C, or spreading redness, warmth or discharge around a wound.
- New or worsening pain, swelling or fluid leakage from the operative site.
- Bleeding that does not stop with gentle pressure.
- Any change in a reconstructed area that concerns you, however minor.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — reconstructive surgery guidance
- World Health Organization (WHO) — burn and trauma care resources
- Chinese Medical Association, Plastic Surgery Branch — clinical guidance
- Cochrane Library — systematic reviews in wound and reconstructive care
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.