Most cuts will leave some trace of a scar, but how you treat the wound in the first hours and weeks makes a dramatic difference in how visible that scar ends up being. The key factors are keeping the wound clean, keeping it moist, protecting it from the sun, and giving your body the nutritional building blocks it needs to lay down collagen properly. Here’s how to handle each stage.
Why Cuts Leave Scars in the First Place
When you cut your skin, your body repairs the damage by producing collagen, a protein that acts like structural scaffolding. But the new collagen doesn’t arrange itself in the same neat pattern as the original skin. Instead, it forms dense, parallel fibers that look and feel different from the surrounding tissue. That’s a scar.
The more inflammation a wound generates, the more collagen your body dumps into the repair site, and the more visible the final scar tends to be. This is why everything on this list essentially comes down to two goals: minimizing inflammation and giving your skin the best conditions to heal efficiently.
Clean the Cut With Water, Not Peroxide
Your first instinct might be to reach for hydrogen peroxide or rubbing alcohol. Skip both. Hydrogen peroxide kills bacteria, but it also destroys the healthy tissue your body needs to close the wound. That damaged tissue then has to be rebuilt on top of the original injury, which can widen the wound and worsen the eventual scar.
Simple tap water works just as well for preventing infection. Run lukewarm water over the cut for five to ten minutes to flush out dirt and debris. If the wound is particularly dirty, a gentle soap around (not inside) the edges is fine. Studies comparing tap water to antiseptic solutions have found no difference in infection rates, so there’s no reason to reach for anything harsher.
Keep the Wound Moist With Petroleum Jelly
This is the single most impactful thing you can do to reduce scarring, and it’s the step most people skip. The American Academy of Dermatology recommends applying petroleum jelly to keep the wound moist throughout the healing process. Petroleum jelly prevents the wound from drying out and forming a scab, and wounds with scabs take longer to heal. It also prevents scars from becoming too large, deep, or itchy.
A dry wound forces your skin cells to burrow beneath the crust to find moisture, slowing down the process of new skin growth. A moist wound lets those cells migrate across the surface quickly and evenly. Apply a thin layer of petroleum jelly and cover with a clean bandage. Change the bandage daily or whenever it gets wet or dirty, reapplying petroleum jelly each time. Continue this until the wound has fully closed.
Switch to Silicone Once the Wound Closes
Once the cut is fully sealed with new skin (no open areas, no oozing), silicone products become your best tool. Silicone gel sheets and topical silicone gels are the most studied scar prevention treatments available. A meta-analysis of clinical trials found that silicone gels reduce scarring incidence and improve pliability, pigmentation, height, and overall scar quality.
Silicone works by creating an occlusive barrier that hydrates the outer layer of skin and reduces the inflammatory signals that drive excess collagen production. You can find silicone sheets (adhesive strips you place over the scar) and silicone gel tubes at most pharmacies. Sheets work well on flat, easy-to-cover areas. Gel is better for joints, the face, or anywhere a sheet won’t stay put. Apply daily for at least two to three months for the best results.
Protect the Scar From Sunlight
New scars are extremely vulnerable to UV radiation. Sun exposure on healing skin triggers inflammation and increases pigmentation, which can darken a scar permanently. A controlled trial published in Acta Dermato-Venereologica confirmed that postoperative UV exposure aggravates the clinical appearance of scars in humans.
Cover the healing area with clothing or a bandage whenever possible. When that’s not practical, apply a broad-spectrum sunscreen with SPF 30 or higher directly over the closed scar. Keep this up for at least 12 months. New scars contain immature collagen and blood vessels that respond to UV differently than normal skin, so even brief sun exposure during this window can leave a mark that’s noticeably darker or redder than it would have been otherwise.
Massage the Scar After It Heals
Once the wound edges are fully closed with no gaps or drainage, gentle massage can help break up the dense collagen fibers and make the scar softer and flatter over time. Use the flat part of your fingers, not your fingertips, and press firmly enough to feel the tissue underneath shift.
There are three basic movements to cycle through:
- Toward the scar: Place your fingers above the scar and push the skin downward toward it, holding for a few seconds. Then repeat from below, pushing upward. Work along the entire length.
- Back and forth: Place your fingers directly on the scar and move the skin and tissue underneath side to side, holding briefly at each end.
- Circles: Place your fingers on the scar and move in small circular motions, pressing enough to mobilize the tissue beneath.
Do this for a few minutes, two to three times per day. It’s most effective in the first several months after the wound closes, when the collagen is still remodeling.
Give Your Body the Right Building Blocks
Collagen depends on specific nutrients to form properly. Vitamin C is essential: without it, your body produces weak, poorly cross-linked collagen that breaks down easily. Zinc supports cell growth and immune function at the wound site. Protein provides the raw amino acids that collagen is built from.
A clinical trial supplementing wound patients with 500 mg of vitamin C, 30 mg of zinc, and 9 grams of the amino acid arginine daily (alongside a high-protein diet) found significantly enhanced collagen production compared to controls. You don’t necessarily need supplements if you’re eating well. Citrus fruits, bell peppers, and strawberries are rich in vitamin C. Meat, shellfish, and legumes provide zinc. And any diet with adequate protein from meat, fish, eggs, dairy, or beans will supply the amino acids your skin needs.
That said, if you’re recovering from a larger or deeper cut, a basic vitamin C and zinc supplement is inexpensive insurance against a deficiency that could meaningfully worsen your scar.
Skip the Vitamin E
Vitamin E oil is one of the most popular home remedies for scars, but the evidence doesn’t support it. A systematic review in the Aesthetic Surgery Journal concluded there is not yet sufficient evidence that topical vitamin E has a significant beneficial effect on scar appearance. Worse, it can actively backfire. One study found contact dermatitis in up to 33% of patients who applied it, with others reporting increased itching and rash. Inflammation from a skin reaction is exactly what you’re trying to avoid during healing, so vitamin E can make the final scar look worse, not better.
Signs of Abnormal Scarring
Most cuts heal into flat, pale scars that fade over one to two years. But some people develop raised scars that need medical treatment. There are two types to watch for.
Hypertrophic scars are pink to red, slightly raised, and stay within the boundaries of the original wound. They usually appear within weeks of the injury and often improve on their own over months to years. Keloids are purplish-red, firm, smooth, and grow beyond the edges of the original cut. They can appear months or even years after the injury and rarely shrink without treatment. Both can feel itchy or uncomfortable.
If you notice your scar growing, thickening, or extending past the original wound line, a dermatologist can intervene early with options like corticosteroid injections or specialized silicone therapy. People with darker skin tones and those with a family history of keloids are at higher risk and may benefit from starting silicone treatment immediately after wound closure as a preventive step.