Scar revision is a broad term for any procedure designed to make an existing scar less noticeable or to restore movement that a tight scar restricts. It doesn’t erase a scar. The goal is to replace a conspicuous scar with one that blends more naturally into the surrounding skin, matching its color, texture, and contour. Scar revision can involve surgery, laser treatments, injections, or a combination of approaches, depending on the type of scar and where it sits on the body.
What Makes a Scar a Candidate for Revision
Not every scar needs revision, and not every scar that bothers you is ready for it. The scars most commonly treated fall into a few categories, each with distinct characteristics that determine which approach works best.
Hypertrophic scars are raised, firm, and sometimes itchy or painful. They stay within the boundaries of the original wound and tend to appear within a month of injury. Many begin to flatten on their own after about six months, which is one reason doctors recommend waiting before pursuing revision. They’re most common on areas of the body where skin is under tension, like elbows, knees, and shoulders.
Keloids look similar but behave differently. They grow beyond the edges of the original wound and don’t regress on their own. They can show up around three months after an injury and keep expanding. Keloids are most common on earlobes, the chest, back, and cheeks. They can be painful and itchy, and they have a frustrating tendency to recur after treatment.
Atrophic scars are the opposite problem: depressed pits or indentations in the skin, most familiar as acne scars. These form when the skin loses underlying support, and fibrous bands tether the surface downward. Contracture scars, often caused by burns, pull surrounding skin tight enough to restrict movement, making them both a cosmetic and functional concern.
Why Timing Matters
Scars change significantly during their first year or two. They typically start out red, raised, and firm, then gradually soften, flatten, and fade. This maturation process can take up to two years, and studies confirm that patients notice meaningful improvements in scar appearance between the 6-month and 18-month marks without any intervention at all. Because of this, most surgeons recommend waiting for a scar to fully mature before attempting revision. Operating on an immature scar risks revising something that would have improved on its own, and the healing tissue may not respond as predictably.
The exception is a scar that restricts movement or function. Contracture scars that limit joint mobility or distort facial features may warrant earlier intervention.
Surgical Techniques
When a scar is wide, raised, or poorly oriented relative to the skin’s natural crease lines, surgical revision can physically reposition or reshape it. The simplest approach is excising the old scar and reclosing the wound with meticulous technique, placing the new incision line along the skin’s natural tension lines so it heals flatter and thinner.
For scars that cross tension lines at an unfavorable angle or that have contracted and pulled skin tight, surgeons use techniques that rearrange the surrounding tissue. A Z-plasty involves cutting two small triangular flaps on either side of the scar and transposing them, which reorients the scar to run parallel to the skin’s natural lines. This is particularly useful for releasing tight, contracted scars because the transposition physically lengthens the tissue in the direction of the contracture.
A W-plasty takes a different approach: instead of transposing flaps, the surgeon cuts the scar margins into a series of small, interlocking triangles. These tiny zigzag segments break up the straight line of the scar and intermingle scar tissue with normal skin, making the scar far less visible from a distance. The irregular border also redirects the forces that cause scars to widen or contract, reducing the chance of recurrence.
Laser Treatments
Lasers work by delivering targeted heat energy into scar tissue, triggering the skin to remodel its collagen and elastin. Different laser types suit different scar problems.
For raised, red hypertrophic scars and keloids, pulsed dye lasers are the most commonly used option. They target the blood vessels feeding the scar, reducing redness and helping flatten the tissue. For depressed scars like acne pitting, ablative lasers (CO2 and erbium) resurface the skin by vaporizing thin layers of tissue and stimulating new collagen production beneath. They’re effective at smoothing texture, but recovery takes longer: skin typically needs 7 to 10 days to heal after CO2 treatment, and 4 to 7 days after erbium. Nonablative fractional lasers create microscopic columns of heat damage while leaving surrounding skin intact, which means faster healing with more modest results per session. Multiple sessions are usually needed.
Laser revision has been used for scars since the 1980s, and the technology has become considerably more refined. Fractional lasers, the current standard for many scar types, allow treatment to be customized to the scar’s depth, texture, and pigmentation.
Injections and Fillers
Steroid injections are the most established non-surgical treatment for raised scars. A corticosteroid is injected directly into the scar tissue, where it reduces inflammation and slows the overproduction of collagen that makes hypertrophic scars and keloids thick and firm. Treatments are typically repeated every four to eight weeks, with most patients needing two to five sessions. Steroid injections are often the first-line approach for keloids and can also be combined with other treatments.
For depressed scars, subcision is a minimally invasive technique where a small instrument is inserted beneath the skin to physically cut the fibrous bands that tether the scar downward. Once those bands are released, the skin surface lifts. Combining subcision with dermal filler injections improves results further: the filler acts as a spacer beneath the released scar, preventing the fibrous bands from reattaching. Studies have found that subcision combined with hyaluronic acid filler produced significant improvement in over 94% of treated patients, compared to about 67% with subcision alone.
What Recovery Looks Like
Recovery depends heavily on the type of revision performed. After surgical scar revision, the initial healing phase typically involves localized swelling, discoloration, and discomfort that lasts one to two weeks. Sutures are usually removed within that window. The new scar will continue to refine and fade over the following months, and final results may not be fully apparent for up to a year as the tissue matures.
Laser treatments generally involve a shorter recovery, ranging from a few days of redness and peeling for nonablative procedures to a week or more of visible healing for ablative resurfacing. Injectable treatments like steroid shots require essentially no downtime, though the scar may be tender for a day or two afterward.
During recovery, sun protection is critical. UV exposure can darken a healing scar permanently, which can compromise the results and complicate any future revision attempts.
Realistic Expectations and Risks
In a study tracking patients for at least two years after surgical scar revision, 82% reported that their scar looked better, 16% saw no change, and 2% felt it looked worse. People whose scars resulted from trauma tended to see better outcomes than those revising scars from elective surgery. Women generally reported better results than men.
The core risk of any scar revision is that the new scar could end up just as noticeable, or occasionally more so, than the original. Keloids carry a particularly high recurrence rate, which is why keloid revision almost always combines surgery with additional treatments like steroid injections or radiation to reduce the odds of regrowth. Other risks include infection, wound separation, and changes in skin pigmentation around the treated area.
The most important thing to understand is that scar revision trades one scar for a better one. The skin will always bear some mark where it was injured. The aim is to transform a scar that draws attention into one that doesn’t.