Scarring is misunderstood. Most people think of it as something that just happens — an inevitable consequence of injury, determined by genetics and luck. The reality is more nuanced, and more optimistic: the choices you make in the hours and days immediately after a wound occurs have a significant influence on whether and how much a scar forms.
You can't always prevent a scar entirely. But you can meaningfully reduce its likelihood and appearance by doing a few things right, early.
Why scars form
Scarring is the body's repair mechanism for wounds that breach the deeper layers of skin — the dermis. When the dermis is damaged, the body mobilizes fibroblasts — cells that produce collagen to close the wound. This repair collagen is structurally different from normal skin collagen: denser, less organized, and lacking the random weave pattern of healthy skin. That structural difference is what you see as a scar.
Factors that influence scar severity:
- Wound depth — deeper wounds damage more dermis and produce more repair collagen
- Wound tension — wounds over joints or high-movement areas heal with more collagen deposition
- Infection — infected wounds trigger a prolonged inflammatory response
- Wound management in the first 72 hours — significantly affects long-term outcomes
The first 72 hours of wound care are the most important for long-term scar outcomes. What you do in that window matters.
The 72-hour window: what to do
1. Clean thoroughly, once. Rinse the wound properly when it first occurs. Remove all debris and contamination. Do not use hydrogen peroxide, alcohol, or iodine — these damage the cells that will form new skin. Clean water or saline is correct.
2. Keep the wound moist. This is the most important thing you can do for scar prevention. Moist wounds heal via a process that produces less scar tissue than dry wounds. When a wound dries out and forms a scab, re-epithelialization has to navigate around the hardened crust — a slower, rougher process that produces more scar tissue. Use a hydrocolloid dressing to maintain a moist environment from the beginning.
3. Protect from sun exposure. New skin over a healing wound is particularly vulnerable to UV damage. UV exposure during healing causes hyperpigmentation. Keep healing wounds covered, and once closed, apply SPF 30+ sunscreen to the area consistently for at least three to six months.
4. Don't pick the scab. If a scab forms despite your best efforts, do not remove it. Scabs protect the forming skin beneath them. Removing them reopens the wound, prolongs inflammation, and directly worsens scarring.
Once the wound has closed: the next phase
Silicone. Silicone gel sheets or silicone-based scar gels are the most evidence-backed topical intervention for scar management. Applied consistently over a healed wound, silicone has been shown to flatten hypertrophic scars and reduce redness. Use from wound closure for at least two to three months.
Massage. Gentle massage of a healed scar — using a moisturizer and firm, circular motions — helps break down the dense collagen structure and can improve scar texture. Begin only once the wound is fully closed and continue for several months.
Moisturize consistently. Dry skin tightens around a healing scar and can worsen its appearance. Keeping the skin over the scar well-moisturized supports the ongoing remodeling process.
What doesn't help (despite popular belief)
Vitamin E: Widely recommended but not well-supported by evidence. Some studies have found no benefit; in some individuals it causes contact dermatitis.
Coconut oil and natural oils: Anecdotally popular but not evidence-based for scar prevention.
Leaving wounds open to the air: The opposite of correct. Wounds do not benefit from air exposure — they benefit from a clean, moist, protected environment.
When to see a professional
Some scars — hypertrophic scars, keloids, or scars over joints that limit movement — are beyond home management. If a scar is thickening, spreading beyond the wound boundaries, or becoming painful months after healing, consult a dermatologist. For most minor wounds managed well from the start, however, significant scarring is the exception, not the rule.