Laser hair removal does not get rid of scars. The lasers used for hair removal target pigment in hair follicles, not scar tissue, and they have no meaningful effect on scar texture, color, or thickness. Scar treatment requires entirely different laser technology. That said, there are a few indirect ways laser hair removal intersects with scarring that are worth understanding.
Why Hair Removal Lasers Don’t Treat Scars
Laser hair removal works through a process called photothermolysis: the laser beam is absorbed by melanin (the dark pigment) in the hair shaft, which heats up and destroys the follicle. The wavelengths used for this, typically between 680 nm and 1064 nm depending on the device, are specifically chosen to target hair pigment deep in the skin without damaging the surface layers.
Scar tissue is structurally different from normal skin. It’s made of dense, disorganized collagen fibers, and the goal of scar treatment is to break down or remodel that collagen. Hair removal lasers simply pass through scar tissue without interacting with it in any useful way. They’re tuned to a completely different target.
Lasers That Actually Treat Scars
If you’re looking to reduce the appearance of a scar, the laser types designed for that job work on different principles entirely. Fractional resurfacing lasers create tiny columns of controlled damage in the skin, prompting the body to replace old scar tissue with new, more normally organized collagen. Pulsed dye lasers target the blood vessels in red, raised scars like hypertrophic scars and keloids, reducing redness and flattening them over time. Ablative fractional lasers remove thin layers of skin to smooth out depressed or textured scars.
These are performed by dermatologists or plastic surgeons and typically require multiple sessions. They share the word “laser” with hair removal devices, but the similarity ends there.
How Laser Hair Removal Can Prevent Some Scarring
Here’s where it gets interesting. While laser hair removal won’t treat existing scars, it can prevent new ones from forming in certain situations. If you deal with chronic ingrown hairs, a condition called pseudofolliculitis barbae, curving hairs re-enter the skin after shaving and trigger an inflammatory response. Over time, repeated inflammation in the same spots can leave dark marks or raised scars, especially in the beard area and bikini line.
Laser hair removal destroys the follicle so the hair never grows back to curl into the skin. It has shown promise as a treatment for pseudofolliculitis barbae, acne keloidalis nuchae (bumps on the back of the neck), and even hidradenitis suppurativa, all conditions where chronic inflammation from hair follicles can lead to permanent scarring. By eliminating the source of irritation, you stop the cycle that produces scars in the first place.
Can Laser Hair Removal Cause Scars?
It can, though it’s uncommon. The overall incidence of serious side effects from laser hair removal is low, and permanent scarring is rare when the procedure is performed by a trained professional with appropriate settings for your skin type. The more common side effects are temporary redness, swelling, and mild discomfort.
The real risks emerge when something goes wrong. Burns from incorrect laser settings or inexperienced operators can cause deep thermal injuries. When a burn reaches into the deeper layers of skin, where the epidermis and its regenerative structures are destroyed, healing produces scar tissue. In severe cases, these scars are permanent. One documented case of genital burns from laser hair removal resulted in permanent hypopigmented (whitish) scarring that remained visible even after proper wound care.
Post-inflammatory hyperpigmentation, where dark patches develop on treated skin, is a more common concern. This happens because the laser energy that targets hair pigment can also affect melanin in the surrounding skin. Most pigmentation changes fade over time, but some are permanent. Darker skin tones carry a higher risk because the laser has more difficulty distinguishing between hair pigment and skin pigment.
Getting Laser Hair Removal Over Existing Scars
If you have a scar and want to remove hair growing through or around it, that’s generally possible, but it requires extra caution. Before any procedure, your provider should review your history of skin disorders, scarring tendencies, and past hair removal procedures. Scar tissue can respond unpredictably to laser energy because its structure and pigmentation differ from surrounding skin.
People with a history of keloids or hypertrophic scarring face a specific risk. Keloids are raised, overgrown scars that extend beyond the original wound, and any trauma to the skin, including laser treatment, can trigger new keloid formation. There are documented cases of keloids developing in laser-treated areas in patients with this predisposition. If you’ve ever had a keloid from a cut, piercing, or surgical incision, make sure your provider knows before treatment.
What to Do if You Want Both
If you’re dealing with unwanted hair and a scar in the same area, these are two separate problems that require two separate treatments. Laser hair removal handles the hair. A dermatologist can evaluate your scar and recommend the appropriate resurfacing or vascular laser for the scar itself. In some cases, both can be treated in the same area over time, but they won’t be done with the same device or in the same session.
If your scars are specifically caused by ingrown hairs or chronic folliculitis, laser hair removal may be the most effective long-term strategy, not because it treats the scars you already have, but because it stops new ones from forming. The existing scars may fade somewhat on their own once the inflammation cycle is broken, though older or deeper scars will likely need direct treatment.