Laser for Surgical and Injury Scars

Laser can often make a surgical or injury scar blend in better by smoothing its texture and reducing redness or uneven colour. It does not remove a scar, and the type of scar and its age largely decide how much it can help. Some scars are better managed first by a surgeon or dermatologist.

How scars mature on their own

Every scar goes through a long healing process. In the first weeks the wound closes. Over the following months, the body lays down collagen quickly and somewhat randomly, which is why a young scar is often pink, firm and slightly raised. Gradually, over roughly a year or longer, the collagen reorganises, the colour fades and the scar softens and flattens.

This natural maturing is important for two reasons. First, many scars improve a great deal without any treatment. Second, the remodelling phase is when the skin is most responsive, so carefully timed laser treatment may help guide how a scar settles.

When to start laser treatment

There is growing interest in treating scars early, sometimes within weeks to a few months of surgery or injury, once the wound has fully closed and any stitches are out. Some studies suggest early treatment can improve the final appearance, though the evidence is still developing and results vary.

Before considering laser, the wound must be completely healed, with no scabs, open areas, drainage or signs of infection. It is also wise to check with your surgeon, particularly after recent operations. Mature scars that are years old can still be treated, but the change is usually more modest.

Raised, flat and sunken scars

Scars are not all alike, and each type calls for a different approach.

Flat scars with colour or texture change

These are often the most suitable for laser. Pink or red scars may respond to gentle heating of small blood vessels with the Nd:YAG wavelength (1064 nm), while rough or shiny surfaces may improve with fractional Er:YAG resurfacing (2940 nm). Brown discolouration needs caution, as heat can sometimes worsen it.

Raised scars: hypertrophic scars and keloids

A hypertrophic scar is raised but stays within the original wound line, and often improves over time. A keloid grows beyond the wound edges, can itch or hurt, and tends to recur. Raised scars are usually managed first with medical treatments such as silicone sheets or gel, pressure, or corticosteroid injections given by a physician. Laser may play a supporting role, but keloids in particular need careful medical assessment, and a dermatologist's input is often appropriate.

Sunken or tethered scars

Scars that dip below the surface or pull on the skin may need other techniques, such as subcision or filler, sometimes combined with resurfacing. Our article on laser for acne scars describes how these combination approaches work for depressed scars.

What a treatment plan looks like

Scar treatment is usually a series rather than a single visit, often several sessions spaced about four to eight weeks apart. Settings are chosen for the scar's type, location, your skin tone and how much recovery time you can accept.

After treatment, expect redness and mild swelling over the scar for a few days. Fractional resurfacing may leave a fine, sandpaper-like surface that flakes over about a week. Gentle cleansing, a bland moisturiser and strict sun protection support healing. Because scars keep remodelling, improvement continues for months after each session.

Your own care at home matters too. Silicone gel or sheets, sun protection and avoiding tension on a healing scar all help, whether or not you choose laser.

Who should not have scar laser, or should wait

You may need to postpone or avoid treatment if you:

• Have a wound that is not fully healed, or any sign of infection.
• Are pregnant.
• Have a history of keloids, unless your plan has been discussed with a physician who manages them.
• Have a tan or recent sun exposure on the area.
• Have used isotretinoin recently, or take medicines that affect healing or light sensitivity.
• Have a history of cold sores, if the scar is near the mouth; preventive medication may be considered.
• Have a medical condition that affects healing, such as poorly controlled diabetes.

Never stop a prescribed medication on your own to have a cosmetic treatment. If a medicine might affect healing, your physician can advise.

Risks to understand

Most side effects are temporary: redness, swelling, tenderness and a short period of flaking. Less common risks include blistering, infection, temporary darkening or lightening of the skin, and, rarely, worsening of the scar or a new scar. Pigment changes are more likely in darker skin tones and in sun-exposed skin. Results vary from person to person, and some scars change only slightly.

When to see a dermatologist or surgeon

Some scars need a specialist's opinion before, or instead of, laser. Consider asking your family doctor for a referral if a scar is growing, painful, itchy or spreading beyond the original wound; if it restricts movement over a joint; if it is a burn scar covering a large area; or if a spot within a scar bleeds, crusts or changes. Very rarely, chronic wounds and old scars can develop skin cancer, so any changing area deserves a proper look.

Scar revision surgery, steroid injections and other medical treatments are sometimes more effective than laser alone, and a responsible plan should include them when they fit better.

Frequently asked questions

How soon after my C-section can I treat the scar?

Once the incision is fully healed and your surgeon is comfortable, usually no sooner than several weeks. Many people also prefer to wait until they are no longer breastfeeding.

Will laser make my scar disappear?

No. The realistic aim is a scar that is flatter, closer in colour and smoother, so it draws less attention.

Can I use silicone gel between sessions?

Often, yes, once the treated skin has settled after a few days. Ask your provider when to restart it after each session.

If a scar bothers you, the first step is understanding what kind of scar it is. A consultation at HealthPark Medical Aesthetics can assess the scar, discuss whether laser, medical treatment or a specialist referral fits best, and leave the decision entirely with you.