Hypertrophic acne scars are raised, firm bumps of excess collagen that sit within the boundaries of the original breakout. Unlike atrophic (indented) acne scars, these scars stick up above the skin’s surface because your body overproduced collagen during healing. The good news: hypertrophic scars are among the most treatable types of scarring, and many flatten significantly on their own within one to three years. If you don’t want to wait, several proven treatments can speed that process considerably.
Why These Scars Form in the First Place
When a deep acne lesion damages your skin, your body sends immune cells to the wound site. Those cells release growth signals that activate collagen-producing cells called fibroblasts. In normal healing, collagen production ramps up and then tapers off once the wound closes. In hypertrophic scarring, that signal stays turned up too high: fibroblasts keep churning out collagen, producing roughly three times the normal amount. The result is a raised, often reddish or pink scar that feels firm or rubbery to the touch.
One important distinction matters here. Hypertrophic scars stay within the borders of the original wound and can regress over time. Keloids, by contrast, grow beyond the original wound edges, produce about 20 times the normal collagen, and rarely shrink on their own. If your scar is spreading past where the acne lesion was, you may be dealing with a keloid, which requires more aggressive treatment. Everything below focuses specifically on hypertrophic scars.
The Natural Timeline of Improvement
Hypertrophic scars typically grow rapidly for the first three to six months after the acne lesion heals. After that, they enter a stable phase and then gradually begin to flatten, soften, and blend closer to your surrounding skin tone. Full maturation takes at least a year, and many scars continue improving for up to three years without any treatment at all. This natural regression is a key difference from keloids, which don’t resolve on their own.
That said, “wait and see” isn’t always practical, especially if scars are on your face or causing discomfort. Starting treatment earlier can shorten the timeline and improve final results.
Silicone Sheets and Gels
Silicone-based products are the most accessible first-line treatment and the one with the longest track record. They work by hydrating the scar tissue and creating a sealed environment that helps regulate collagen production. You can find adhesive silicone sheets or silicone gel tubes at most pharmacies without a prescription.
For sheets, the standard recommendation is wearing them 12 to 24 hours per day. Gel formulations are applied twice daily in a thin layer and allowed to dry. The catch is consistency: you need to keep this up for 6 to 12 months to see meaningful results. Many people give up after a few weeks, which is usually too early to judge effectiveness. These products work best on newer scars and are a reasonable starting point before moving to in-office treatments.
Scar Massage
Manual massage helps break up the dense collagen fibers that make hypertrophic scars feel stiff and raised. Several specific techniques are used in clinical practice. The simplest is moderate, vertical finger pressure applied in small circles over the scar without sliding across the surface. As the scar matures and softens, you can progress to gently pinching and lifting the scar tissue between your fingers and slowly rolling it, a technique called palpate-rolling. This helps release deeper adhesions and soften fibrosis.
Massage is most effective when the scar’s surface is fully healed and intact. You can combine it with silicone products, doing your massage before reapplying the sheet or gel. While the research doesn’t specify an exact number of daily sessions, most clinicians recommend several minutes of massage once or twice a day.
Steroid Injections
If silicone and massage aren’t enough, steroid injections are the standard next step. A dermatologist injects a corticosteroid directly into the scar tissue, which reduces inflammation and slows collagen production. These injections are typically spaced four to eight weeks apart, and most people need several rounds to reach their goal.
The results can be substantial. Studies report 50 to 100 percent regression of scar tissue with steroid injections alone, and one long-term study found that 71 percent of treated scars were fully flattened at 10-year follow-up. Another study documented an 82.7 percent reduction in scar size over the course of treatment.
Steroid injections do carry some risks. The most common side effects are skin thinning at the injection site and loss of pigment (hypopigmentation), which can be especially noticeable on darker skin tones. Your dermatologist will adjust the concentration based on the scar’s location and thickness to minimize these effects. Scars on the face typically receive lower concentrations than those on the chest or back.
Laser Treatments
Pulsed dye lasers target the blood vessels feeding the scar, which reduces redness and helps flatten the tissue over time. A typical course involves three to eight sessions spaced about four weeks apart. The procedure causes mild discomfort similar to a rubber band snapping against the skin, and redness at the treatment site usually fades within a few days.
For people with darker skin, the choice of laser matters. Ablative lasers, which remove surface tissue more aggressively, carry a higher risk of post-treatment darkening (hyperpigmentation). Newer non-ablative wavelengths target collagen fibers specifically without affecting the outer skin layer or blood vessels, which reduces the risk of peeling, redness, and pigment changes. If you have medium to dark skin, ask your provider specifically about devices tested and validated for darker phototypes.
Radiofrequency Microneedling
Radiofrequency microneedling uses tiny needles to deliver heat energy directly into the deeper layers of the scar. Because the needles are insulated except at the tips, the energy bypasses the skin’s surface and targets only the dermis where the excess collagen lives. This makes it a safer option for darker skin tones compared to traditional lasers.
The evidence for radiofrequency microneedling on hypertrophic scars specifically is still limited, but early clinical results are promising when it’s combined with steroid injections. The combination approach works on two fronts: the heat energy remodels existing collagen while the steroid prevents new excess collagen from forming. Most treatment plans involve multiple sessions, and your provider may alternate between the two modalities.
Combination Approaches
Some dermatologists combine steroid injections with a chemotherapy-derived compound that slows the rapid cell division driving scar growth. One clinical trial using this combination delivered via a needle-free jet injector found a 33 percent decrease in scar volume and a 37 percent decrease in surface area after a single treatment session. Patients reported low pain levels (about 2 out of 10), and 90 percent of those who had previously received traditional needle injections preferred the jet delivery method.
Combination therapies are generally reserved for scars that haven’t responded well to steroid injections alone or for larger, more stubborn scars. Your dermatologist can layer treatments over time, starting with less invasive options and escalating if needed.
What to Expect Realistically
No single treatment erases a hypertrophic scar completely in one visit. Here’s a rough sense of timelines for the most common approaches:
- Silicone products: Earliest visible improvement around 2 to 3 months, with full results at 6 to 12 months of consistent daily use.
- Steroid injections: Noticeable flattening often starts after the second or third session, with treatments spaced 4 to 8 weeks apart. A full course may take several months.
- Laser treatments: Redness reduction is often visible after the first session. Flattening and texture improvement build gradually over 3 to 8 sessions.
- No treatment: Natural regression begins after 6 months and can continue improving for up to 3 years.
Many dermatologists recommend starting with silicone products and massage for newer scars, then adding steroid injections if the scar remains raised after several months. Laser and radiofrequency treatments typically enter the picture for scars that are resistant to injections or where redness is a primary concern. The best outcomes usually come from combining two or more approaches rather than relying on any single treatment.