
Nearly every week in our St. Louis clinic, someone says:
“I hate the way this scar looks. I don’t even notice it most days, but when I do, it bothers me.”
Scars are incredibly common and incredibly personal. They can follow injury, surgery, acne, childbirth, burns, or even something as minor as a scraped knee. But what many people don’t fully realize is that scars are not static — they evolve, soften, remodel, and can change dramatically over time.
Understanding why scars form and what affects their long-term appearance allows us to guide patients with clarity, compassion, and science. At Sheen Vein Aesthetics & Functional Medicine, our approach focuses on the biology behind the scar, not just the surface appearance.
This blog explains the physiology of scar formation, types of scars, factors that influence healing, and what patients can expect as scars mature.
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A scar is the body’s natural attempt to repair damaged skin integrity. Whenever the skin is injured beyond the superficial epidermis, the body triggers an intricate, multi-layered repair response.
A scar is not a flaw — it is your body’s best effort to restore strength and protection.
This healing tissue is different from pre-injury skin. It often lacks:
This is why scars look and feel different from surrounding skin.
The body’s healing process unfolds in predictable stages.
Immediately after injury, platelets, clotting factors, and fibrin form a protective plug. This becomes the temporary “scaffold” for new tissue.
White blood cells clean the wound and remove bacteria or debris. This phase brings redness, swelling, and warmth.
This is where early scar tissue begins forming:
The scar is typically pink, raised, and firm during this time.
Collagen reorganizes, softens, and realigns along tension lines.
This phase determines how flat, soft, or pale a scar becomes long term.
These are the most common. They may be discolored initially but flatten over time.
Raised scars that stay within the boundaries of the original wound. Common after burns, surgery, or high-tension areas (back, chest, shoulders).
These extend beyond the boundary of the original injury, forming thick, rubbery scars. They occur more frequently in certain skin types and genetic backgrounds.
These occur when collagen loss exceeds collagen production — common in acne scarring or after deep infections.
These form after burns and can reduce mobility by tightening the skin.
Some individuals simply produce more collagen, increasing their risk for raised scars.
Younger patients heal faster but may produce more collagen. Older individuals heal more slowly but may form smoother scars.
Areas that stretch (shoulders, chest, joints) often scar more dramatically.
UV exposure during healing worsens discoloration and prolongs redness.
High inflammation = thicker, more fibrotic scars.
The deeper the injury, the more pronounced the scar.
Melanocyte activity influences hyper- and hypopigmentation in scars.
Clinically, scars are biological. But personally, they are deeply emotional.
Scars can represent trauma, a painful memory, or a moment in life that a person didn’t choose to carry with them. As clinicians, we never treat a scar as “just cosmetic.”
Many patients describe:
Scars deserve compassion, validation, and clinical attention — even when they are medically harmless.
Even without discussing treatments, there are clear clinical indications for evaluation:
Early evaluation can help us monitor scar maturation and educate patients on what to expect.
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Red, firm, raised, stiff — completely normal.
Begins softening and flattening; color slowly fades.
Collagen reorganizes; scar may continue improving for two years or more.
While the internet is full of advice, high-quality scar assessment requires:
Our role is education, reassurance, and guiding patients with evidence-based expectations.
Scars are biologically complex and emotionally significant.
Whether from injury, surgery, acne, or burns, each scar tells a story — and for many people, that story is not one they want to carry forever.
Understanding scar formation empowers patients to make informed decisions about their skin and their health.
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