Scars can’t be erased completely, but most can be significantly improved with the right approach. The method that works best depends on what type of scar you’re dealing with, how old it is, and how your body produced it in the first place. A fully matured scar only reaches about 80% of the original skin’s strength, so the goal is always improvement, not perfection. That said, the range of effective treatments today, from simple silicone sheets to professional laser procedures, can make a dramatic difference in how a scar looks and feels.
Why Scars Form in the First Place
When your skin is injured, it repairs itself in three overlapping stages. First comes inflammation, lasting several days, where the body stops the bleeding and clears out damaged cells. Next is proliferation, lasting several weeks, where specialized cells called fibroblasts begin laying down collagen to rebuild the wound. By days five through seven, new collagen is already forming the structural framework of what will become your scar.
The final stage, remodeling, is the longest. Your body reorganizes and strengthens that collagen over months, sometimes more than a year. The problem is that your body doesn’t rebuild the collagen in the same neat, basket-weave pattern as your original skin. Instead, it lays collagen down in parallel bundles, which is what gives scar tissue its different texture and appearance. How much collagen your body produces, and how it arranges it, determines what kind of scar you end up with.
Know Your Scar Type
Treatments work differently on different scar types, so identifying yours is the first step.
- Atrophic (indented) scars form when the body produces too little collagen during healing. These include the pitted or depressed scars common after acne or chickenpox.
- Hypertrophic scars are raised, firm, and often red or itchy. They form when collagen accumulates for a prolonged period, sometimes six to twelve months, but they stay within the borders of the original wound. Prolonged inflammation from any cause, including tension on the wound, ingrown hairs, or delayed healing, increases the risk.
- Keloids behave more like a slow-growing tumor. Unlike hypertrophic scars, keloids spread beyond the original wound borders and can continue growing years after the injury. They often have a mushroom-like appearance and are much more common in people of African or Asian descent. Even a minor scratch or ear piercing can trigger one in genetically susceptible individuals.
- Contracture scars form after burns and tighten the skin, sometimes restricting movement if they cross a joint.
Start With Prevention: How Early Wound Care Matters
The single most important thing you can do for a future scar is how you treat the wound in its earliest days. Research in porcine wounds (which closely mimic human skin healing) found a strong correlation between the number of inflammatory cells present at day three and the amount of scarring visible by day four weeks later. Wounds kept moist developed significantly smaller scars compared to wounds left to dry and scab over.
This means keeping a healing wound clean and covered with an ointment or occlusive bandage rather than letting it “air out.” A scab is not a sign of good healing. It’s a dried-out barrier that forces new skin cells to burrow underneath it, slowing the process and increasing inflammation. Keeping the wound moist reduces that inflammation, and less inflammation means a flatter, less visible scar.
Silicone: The Best-Studied At-Home Treatment
Silicone gel and silicone sheets are the most consistently supported over-the-counter scar treatment. In studies on hypertrophic scars and keloids, silicone gel produced an 86% reduction in texture, 84% in color, and 68% in scar height. You apply a thin film twice daily, and the gel works by trapping moisture against the scar and regulating collagen production during the remodeling phase.
Silicone works best on newer scars that are still maturing, typically in the first one to two years. It’s a low-risk option with minimal side effects. For raised scars especially, consistent daily use over several months is key.
Onion Extract Gels
Over-the-counter gels containing onion extract (the active ingredient in products like Mederma) do have clinical support, though the effects are more modest than silicone. In a controlled study on new surgical scars, onion extract gel applied for eight weeks produced statistically significant improvements in overall appearance, texture, redness, and softness compared to untreated scars. About 14% of users experienced mild itching, burning, or stinging that resolved on its own. It’s a reasonable addition to a scar care routine, particularly for newer, flatter scars.
Protect Your Scar From the Sun
UV exposure is one of the fastest ways to darken a maturing scar permanently. New scar tissue lacks the pigment-regulating mechanisms of normal skin, making it especially vulnerable. UVB radiation increases the production of melanin in skin cells, while UVA can darken existing melanin in as little as a few hours. The result is a scar that turns noticeably darker than the surrounding skin, a change that can be very difficult to reverse.
Apply a broad-spectrum sunscreen of SPF 30 or higher to any healing or maturing scar every time it will be exposed to sunlight. This is one of the simplest, highest-impact things you can do, and it matters for at least the first year or two while the scar is still actively remodeling.
Microneedling for Indented Scars
Microneedling uses tiny needles to create controlled micro-injuries in the skin, which triggers your body to produce new collagen in the damaged area. The needles break up the dense collagen bundles responsible for the scar’s appearance and stimulate replacement with more organized tissue. New collagen continues to form for a year or longer after treatment.
For atrophic acne scars, studies show mild improvement after two sessions (about one month), with good improvement in scar appearance and skin texture after six sessions over three months. The process is gradual because collagen deposition happens slowly. Most people need multiple sessions spaced weeks apart, and the full result takes months to appear. Microneedling is particularly effective for rolling and boxcar acne scars, which respond well to increased collagen production beneath the skin’s surface.
Laser Treatments for Raised and Red Scars
Two main types of lasers target different scar problems. Pulsed dye lasers are best for scars that are red or have visible blood vessels, as they’re significantly more effective at reducing vascularity (the redness caused by excess blood flow in scar tissue). Fractional CO2 lasers, on the other hand, are better for improving the texture and height of raised scars by vaporizing tiny columns of scar tissue and triggering new collagen formation.
If your main concern is redness in a relatively flat scar, pulsed dye laser is the better fit. If thickness, stiffness, or texture is the problem, fractional CO2 laser is more effective. Many dermatologists combine both types across a treatment series to address multiple scar characteristics at once. Expect multiple sessions and weeks of healing between each.
Chemical Reconstruction for Deep Ice Pick Scars
Narrow, deep ice pick scars from acne are notoriously difficult to treat because their depth-to-width ratio makes them resistant to surface-level approaches like microneedling or standard laser. A technique called TCA CROSS places a high-concentration acid directly into each individual scar, causing the walls to collapse inward and stimulating new collagen from the base up. In a pilot study, more than 70% improvement was seen in eight out of ten patients, with the remaining two patients showing 50 to 70% improvement. Multiple sessions are typically needed, spaced several weeks apart.
Steroid Injections for Keloids and Raised Scars
For keloids and stubborn hypertrophic scars, steroid injections directly into the scar tissue are one of the most effective treatments. The injections work by reducing collagen production and shrinking the inflammatory component of the scar. They’re given monthly until symptoms resolve.
Injections alone can be effective, but combining them with a potent topical steroid applied between visits improves outcomes significantly. One study found that this combination approach achieved 85.7% recurrence-free results over an average follow-up of nearly three years. Keloids are notorious for recurring, so this combination strategy is often preferred over injections alone. Steroid injections can cause temporary side effects like skin thinning or lightening at the injection site, which is why lower doses given monthly tend to be favored over aggressive single treatments.
How Long Scar Healing Takes
Scar maturation follows a predictable but slow timeline. The initial inflammatory phase lasts days. The proliferative phase, where the bulk of new tissue forms, spans several weeks. The remodeling phase, where collagen reorganizes and the scar softens, flattens, and fades, continues for months to well over a year. Most scars look their worst at two to three months, when collagen production is at its peak but remodeling has barely begun.
This matters because many people start treatments or panic about a scar’s appearance while it’s still in early remodeling. A red, raised scar at three months is not necessarily what it will look like at twelve or eighteen months. Starting with conservative measures like silicone, sun protection, and gentle massage during this window gives the scar the best chance to improve on its own, while more aggressive treatments like lasers or injections can be layered in if the scar isn’t responding after several months of maturation.