Home treatments can genuinely flatten a hypertrophic scar, but the process is slow, consistency-dependent, and unlikely to erase the scar entirely. Silicone-based products, whether sheets or gels, remain the internationally recommended first-line option for home scar management and have the strongest clinical backing of any over-the-counter approach. The realistic part of the equation involves understanding that meaningful improvement typically takes months of near-daily use, that some scars respond far better than others depending on their location and your skin type, and that a handful of popular remedies simply do not work despite widespread belief.
Why Hypertrophic Scars Behave the Way They Do
Before choosing a treatment, it helps to know what you’re dealing with. A hypertrophic scar forms when the body overshoots its wound-repair process and deposits too much collagen at the site. Unlike a keloid, which spreads beyond the borders of the original wound, a hypertrophic scar stays within the wound’s boundaries.1PubMed Central. Hypertrophic scars and keloids: Overview of the evidence and practical guide for differentiating between these abnormal scars That distinction matters because home treatments are far more likely to help a hypertrophic scar than a keloid. Hypertrophic scars also have a natural tendency to flatten somewhat on their own over one to two years, which means any home treatment is working alongside your body’s own remodeling process rather than doing all the heavy lifting.
The location of the scar plays a major role in how it behaves. Skin areas under high mechanical tension, such as the chest, shoulders, and jaw, are where raised scars thrive. An analysis of over 1,500 keloids in Japanese patients found that the anterior chest accounted for nearly half of all cases, with the scapular region and lower jaw/neck following behind. These high-tension zones are also where hypertrophic scars tend to be most stubborn.2PubMed Central. Ideal Surgical Incision Lines Minimizing Tension: A Proposal Based on Observations of Hypertrophic Scars and Keloids A scar on your forearm or abdomen may flatten more readily with home care than one sitting across your sternum, simply because every breath and arm movement tugs at a chest scar and signals the body to keep reinforcing it with collagen.
Silicone Products Are the Starting Point
If you spend any time reading clinical guidelines on scar management, silicone comes up immediately. Silicone gel sheets and topical silicone gels have been used in scar therapy for over three decades and are considered the first-line form of scar management by international consensus among healthcare professionals. The mechanism is not fully understood, but the leading explanation is that silicone occludes and hydrates the outer layer of skin over the scar, which triggers chemical signaling from the skin’s surface cells down to the collagen-producing cells beneath.3PubMed. Evolution of silicone therapy and mechanism of action in scar management In practical terms, it seems to calm the overactive healing response that created the raised scar in the first place.
You have two main options at the pharmacy. Silicone gel sheets are adhesive strips you cut to size and wear over the scar for hours at a time. Topical silicone gels are clear liquids you spread over the scar and let dry into a thin film. Both deliver the same basic effect. Sheets can be more effective for flat, easily covered areas because they maintain constant contact, but they can be awkward on joints, the face, or areas covered by clothing that shifts throughout the day. Gels are more discreet and easier to apply on irregular surfaces, though they dry into a thinner layer and can rub off.
Consistency Is What Actually Determines Results
The single biggest factor separating people who get noticeable improvement from those who don’t is how often they use the product. A study tracking patients using both silicone sheets and topical silicone gel found that those who applied silicone products for fewer than three days per week actually saw their scar pigmentation and height worsen, especially in the gel group. Patients who used the products four or more days per week, on the other hand, showed significant improvements in scar height, pigmentation, and hardness.4Journal of Wound Management and Research. Increased Patient Compliance with Silicone Gel Sheeting and Topical Silicone Gel for Hypertrophic Scar Improves Scar Outcomes Pain and itching tended to improve regardless of how consistently the product was applied, which is a small consolation for inconsistent users, but for the actual flattening you’re after, the data is clear: sporadic use is almost worse than no use.
Most clinical protocols recommend wearing silicone sheets for at least twelve hours a day, ideally longer, and applying gels twice daily. That level of commitment across several months is harder than it sounds. Life gets in the way, sheets peel off, gels feel sticky under clothing. But if you start silicone treatment and use it only when you remember or when it’s convenient, don’t expect the scar to budge much.
Practical Problems with Silicone Sheets
Silicone sheeting works, but it comes with real-world annoyances that the product packaging tends to gloss over. A study from Saudi Arabia catalogued the problems patients ran into and found that persistent itching affected about four out of five users. Skin rashes occurred in roughly a quarter of patients, and skin breakdown or maceration was reported by a smaller but meaningful fraction. Over half of patients found the sheets did not improve dry, dehydrated scars, and about one in four saw poor scar response even with consistent use.5PubMed. Problems associated with the use of silicone gel sheeting for hypertrophic scars in the hot climate of Saudi Arabia
Heat and humidity amplify these issues. If you live in a hot climate or the scar is in an area that sweats heavily, the sheet can trap moisture and create an environment that irritates the surrounding skin. Practical workarounds include cleaning and drying the scar site before reapplying, replacing sheets when they lose adhesion, and switching to a topical gel during the hottest months. Some people alternate between sheets at night, when the climate-controlled bedroom makes prolonged wear more tolerable, and gel during the day.
Scar Massage as a Complement
Massage is one of the oldest and cheapest things you can do for a raised scar, and there’s a physiological rationale behind it. Mechanical pressure applied through massage can accelerate scar maturation by encouraging the breakdown and reorganization of collagen.6Journal of Wound Management and Research. The Effects of Massage with Topical Agents (Mepiform Ultra Scar Gel or Scarnos Gel) on Scar Tissue Thickness and Fibroblast Proliferation in Rats The idea is that controlled, repeated pressure helps the body remodel the disorganized collagen bundles in a hypertrophic scar into something more closely resembling normal skin architecture.
The caveat: most of the massage evidence comes from animal models and clinical tradition rather than large human trials. It’s generally recommended as something to do alongside silicone or other treatments rather than on its own. The typical approach is firm circular pressure over the scar for five to ten minutes, two or three times a day, once the wound is fully closed and there’s no scabbing. You can use a silicone gel or a basic moisturizer as a lubricant. It shouldn’t hurt, but it also shouldn’t be so gentle that you’re barely touching the surface. Think of the pressure you’d use to knead a knot in your shoulder.
Onion Extract Gels: Better Than Their Reputation Suggests
Products containing onion extract, like Mederma, tend to get dismissed in online scar-care communities as glorified moisturizer. The evidence is actually more nuanced. A small controlled trial on surgical scars found that the side treated with onion extract gel had significantly lower scar height than the untreated side at both one month and three months.7PubMed Central. Effectiveness of Onion Extract Gel on Surgical Scars in Asians A broader systematic review looking across multiple studies found that several trials reported statistically significant improvements in overall scar scores and individual scar components in groups treated with onion extract compared to silicone.8Journal of Burn Care & Research. The Efficacy of Onion Extract on the Prevention or Treatment of Scars: A Systematic Review
That said, the picture isn’t uniformly positive. A double-blinded trial on presternal hypertrophic scars, one of the toughest scar locations, found that a silicone-plus-onion-extract combination improved pigmentation compared to untreated scars, but did not outperform the untreated group on vascularity, pliability, or height.9PubMed Central. Role of silicone derivative plus onion extract gel in presternal hypertrophic scar protection: a prospective randomized, double blinded, controlled trial The takeaway is that onion extract gels aren’t useless, but their effects are modest and inconsistent, and they seem to help more with color and texture than with actual height reduction. If silicone products irritate your skin or you want to layer an additional topical on top of silicone therapy, onion extract is a reasonable addition rather than a replacement.
Centella Asiatica: A Quieter Contender
Centella asiatica, sometimes marketed as cica cream or containing the active compound asiaticoside, is a botanical ingredient that has gained traction in scar care, especially in Asian skincare markets. The plant compounds promote collagen synthesis and skin cell growth in a way that appears to help scars mature and strengthen rather than simply piling on more disordered tissue.10PubMed Central. A Prospective Randomized, Controlled, Double-Blind Trial of the Efficacy Using Centella Cream for Scar Improvement A randomized trial on patients after carpal tunnel surgery found that the group using centella cream had significantly improved overall scar scores between three and six months post-surgery.11PubMed. The effect of Centella Asiatica cream on scar development in patients who underwent open carpal tunnel release surgery
The evidence base for centella in scar care is still smaller than for silicone, and most studies are on surgical scars rather than established hypertrophic scars. But it’s one of the more promising botanical ingredients, and if you spot it as an active ingredient in a scar cream, it’s worth considering as part of a broader routine. Just don’t expect it to replace silicone as a standalone treatment for a scar that’s already raised and firm.
What Doesn’t Work: Vitamin E
Vitamin E is probably the most commonly recommended scar remedy that lacks supporting evidence. The idea has been around for decades, and many people still crack open vitamin E capsules and rub the oil on their scars. The clinical literature, however, does not support the practice. Reviews of the available evidence have concluded that vitamin E does not improve scarring and may actually cause harm.12PubMed Central. Vitamin E for treating children’s scars. Does it help reduce scarring? Specifically, a systematic review found that two of the six studies it included reported adverse events from vitamin E application, including contact dermatitis and increased itching and rash.13PubMed. The Role of Topical Vitamin E in Scar Management: A Systematic Review
The persistence of this myth is remarkable given how clearly the evidence points the other way. If you’re currently using vitamin E on a hypertrophic scar, stop. You’re not helping the scar, and you may be sensitizing the surrounding skin and making itching worse.
Skin Color Changes What You Should Expect
Scar treatment research has a significant blind spot when it comes to darker skin tones. People with deeper complexions are more prone to both hypertrophic and keloid scarring, yet specific treatment guidelines for these populations remain lacking. A comprehensive review of non-surgical scar treatments in skin of color found both a shortage of effective treatments studied in this group and a need for more individualized, multimodal approaches.14PubMed Central. A Comprehensive Review of Non-Surgical Treatments for Hypertrophic and Keloid Scars in Skin of Color
What this means practically is that if you have a darker skin tone, the general advice still applies, silicone first, consistency always, but you should be more cautious about expecting results that match what clinical studies report, since most of those studies were conducted predominantly in lighter-skinned populations. You may also want to be especially mindful of post-inflammatory hyperpigmentation, where the scar and surrounding skin darken after treatment or irritation. Silicone is generally well-tolerated across skin types, but anything that irritates the skin, including poorly fitting sheets or harsh topicals, carries an extra risk of leaving darkened marks on deeper complexions.
A Realistic Home Routine
Putting all of this together, a practical daily approach for someone trying to flatten a hypertrophic scar at home looks something like this:
- Silicone first: Apply a topical silicone gel twice daily or wear a silicone sheet for at least twelve hours. The sheet can go on at night and come off in the morning if daytime wear is impractical.
- Massage daily: Spend five to ten minutes massaging the scar with firm, circular pressure once or twice a day. Use a silicone gel or plain moisturizer to reduce friction.
- Optional topicals: An onion extract gel or centella-based cream can be layered in during the hours you’re not wearing a silicone sheet. Neither is essential, but both have at least some evidence behind them.
- Sun protection: UV exposure can darken a scar and make it more visible, even if it doesn’t directly worsen the height. Cover the scar or apply sunscreen with a high SPF whenever it will be exposed.
- Patience: Expect to maintain this routine for at least three to six months before judging whether it’s working. Some scars take longer. Improvement tends to be gradual enough that you won’t notice week to week, so taking monthly photos from the same angle under the same lighting helps you track real change.
Skip vitamin E. Skip cocoa butter. Skip any product that doesn’t name a specific active ingredient backed by at least some clinical data. And don’t waste money on laser-patterned silicone sheets or premium branding when a basic medical-grade silicone sheet from a pharmacy does the same thing.
When Home Care Reaches Its Limit
Some hypertrophic scars simply don’t respond enough to topical treatment alone, and it’s worth knowing what the next steps look like so you can make a timely decision. Intralesional steroid injections, typically triamcinolone acetonide, have long been the standard in-office treatment for raised scars. The injections are delivered directly into the scar tissue with a fine needle, and they work by suppressing collagen production and shrinking the scar from within. They’re not pleasant, but each round is quick, and most scars need a series of three to six sessions spaced several weeks apart.15PubMed. Comparative efficacy of intralesional verapamil hydrochloride and triamcinolone acetonide in hypertrophic scars and keloids
A reasonable rule of thumb is that if you’ve maintained consistent silicone use and massage for three to four months with no visible improvement, or if the scar is actively growing or becoming more symptomatic, it’s time to see a dermatologist. Home care and clinical treatment aren’t mutually exclusive. Many dermatologists will recommend continuing silicone between injection sessions, and some newer protocols combine injections with laser therapy or pressure garments for stubborn cases. The point of home care was never to avoid professional help entirely; it’s to give your scar the best possible environment to flatten on its own, and to buy meaningful improvement for the scars that will respond to it.
The Timeline Nobody Talks About
One of the most frustrating aspects of scar management is how poorly the timeline is communicated. Most product packaging implies results in weeks. Clinical research operates on a scale of months. And the biology of scar remodeling can stretch across a year or two. Hypertrophic scars are most active and responsive to treatment in their first six to twelve months. After that, the collagen becomes more cross-linked and mature, making it harder for topical treatments to influence. Starting silicone early, ideally as soon as the wound has fully closed and any sutures are out, gives you the best window of opportunity.
That doesn’t mean old scars are hopeless. Scars that are several years old can still soften and flatten somewhat with consistent silicone and massage, but the degree of change is usually more modest. If you have a scar that’s been stable for years and you’re just now starting treatment, temper your expectations accordingly. The color may improve, the texture may soften, and the height may come down slightly, but you’re unlikely to achieve the same degree of flattening that someone gets by treating a scar in its first few months.
The honest bottom line on home scar care is that it works, but it works slowly, it works better on some scars than others, and it demands a level of daily commitment that most people underestimate going in. If you can commit to that, silicone-based treatment combined with regular massage gives you the best shot at meaningful improvement without stepping into a clinic.