01 · Overview
The short version
Scars and stretch marks form for different reasons
A scar forms over a wound as the body repairs skin after a cut, burn, surgery, infection, or sore. Stretch marks are lines caused by rapid skin stretching and changes in the deeper skin layer.
Most scars improve, but they do not fully disappear
Scars often fade, flatten, or soften with time, yet they usually remain in some form. Stretch marks often lighten too, but many do not vanish completely.
The change matters more than the label
A mark that becomes more painful, warm, swollen, red, draining, or open is more concerning than a stable scar. A new, widespread stretch-mark pattern with bruising or weakness can point to a separate health issue.
Treatment can help appearance, not erase the mark
Options such as silicone, injections, laser treatment, dermabrasion, chemical peels, creams, or surgery may make some scars less noticeable. Benefits for stretch marks are usually more limited and depend on the age of the marks and the skin involved.
02 · Care guidance
When to get help
Emergency help
- Call 911 or go to the emergency department now if a skin wound or scar comes with trouble breathing, face or throat swelling, severe bleeding, a rapidly spreading rash, confusion, or signs of sepsis such as fever with extreme weakness and fast breathing.
Get advice promptly
- Contact a clinician soon if a scar becomes very painful, increasingly red or warm, starts draining pus, opens up, keeps growing above the skin, or appears after surgery and the incision seems to be separating.
- Make an appointment if stretch marks appear with easy bruising, major weight change, new muscle weakness, or other body changes that suggest a hormone or medication issue.
If a scar or stretch mark is stable, not painful, and not infected, gentle skin care is reasonable. Ask a primary care clinician or dermatologist if the appearance bothers you or if you want to talk through options that fit the type of mark.
03 · Scars And Stretch Marks
Telling a scar from a stretch mark
A scar is the result of healing after skin injury. A stretch mark is more like a split in skin support from rapid stretching, so the pattern and history usually look different.
A scar is permanent repair tissue that grows over a wound. It can follow a cut, scrape, burn, sore, surgery, infection, or acne. Scars are often thicker, pinker, redder, or shinier than nearby skin. The look depends on the size and depth of the wound, where it is, how long it took to heal, your age, and your inherited tendency to scar.
Stretch marks usually show up as lines or bands rather than one isolated spot. They often appear on the abdomen, breasts, hips, thighs, buttocks, or upper arms after growth, pregnancy, weight change, or steroid exposure. Because the supplied source does not cover stretch marks in detail, the practical point is this: a new line pattern after body stretching is usually different from a scar left by a single wound.
- Scars usually follow a clear injury or procedure.
- Stretch marks often appear in pairs or bands across an area that has stretched.
- A stable mark is different from one that is actively changing.
04 · Scars And Stretch Marks
Why some marks stay noticeable
How a mark heals depends on wound depth, healing speed, location, and your skin’s own tendency to make more or less scar tissue.
The body closes a wound by laying down collagen. If the wound is deep, slow to heal, infected, or repeatedly irritated, the final scar is more likely to be wide, thick, or raised. The supplied source also notes that inherited tendency affects how a scar looks, which is why two people can heal the same kind of wound very differently.
Scars on some body areas are more likely to be noticeable because the skin moves, stretches, or gets rubbed often. Scars near joints can also matter more because tight tissue may limit motion. That is one reason a scar is not just a cosmetic issue when it crosses a knuckle, elbow, knee, or another moving part.
- Deeper or infected wounds are more likely to scar visibly.
- Repeated irritation can make a scar look worse.
- Location matters because movement and tension affect healing.
05 · Scars And Stretch Marks
What healing should look like over time
A healing scar should slowly calm down, not become hotter, more painful, or more swollen as time passes.
Fresh scars are often pink, red, or darker than the surrounding skin. They can look firm or slightly raised at first. Those changes can still be part of normal healing, especially early on. The important clue is the direction of change. A stable scar usually becomes less tender and less noticeable over time, even if it does not disappear.
A scar that keeps getting more painful, more swollen, warmer, or redder is not following the usual healing pattern. If a wound that seemed closed starts to open again, that is also a sign to get it checked. Stretch marks, when they are just stretch marks, should not act like an infected wound.
- Mild color change or firmness can be normal early on.
- Improvement should be gradual, not sudden.
- Worsening pain, warmth, or drainage is a warning sign.
06 · Scars And Stretch Marks
Why some scars are raised, tight, or spreading
Not all scars behave the same way. Some stay flat, while others thicken, tighten, or grow beyond the original wound.
Flat scars are often the least noticeable. Hypertrophic scars are raised and thick but stay within the original wound borders. Keloids are more aggressive and extend beyond the wound, where they may keep enlarging. Contracture scars can tighten the skin after burns or deep injuries and may limit movement, especially when they cross a joint.
These differences matter because the treatment choice depends on the scar type. A raised scar may respond to injections or silicone-based treatment, while a tight scar across a joint may need a more specialized approach. A scar that spreads past the wound edge deserves attention because it may continue to grow.
- Flat scars are usually less noticeable.
- Keloids can extend past the original wound.
- Contracture scars can limit movement near joints.
07 · Scars And Stretch Marks
When stretch marks are just stretch marks
Stretch marks usually start out colorful, then fade. They are often a cosmetic issue, but sudden widespread marks can be a clue to something else.
Stretch marks often begin red, pink, purple, or brown and later fade to lighter lines. They may feel mildly itchy when they first appear, but they usually are not painful or infected. Because the supplied source does not address stretch marks directly, this section stays general: the usual course is gradual fading, not sudden worsening.
What makes stretch marks worth a medical visit is the pattern around them. If they appear very suddenly, spread quickly, or show up with easy bruising, muscle weakness, major weight change, or other body changes, a clinician should look for a possible medication effect or hormone-related issue. The mark itself may not be the main problem.
- New stretch marks are often more colorful than older ones.
- They usually fade, even if they do not disappear.
- Other body changes matter more than the marks alone.
08 · Scars And Stretch Marks
What treatment can and cannot do
Treatment can often improve a scar’s look or feel, but it rarely removes it completely, and stretch-mark results are usually more limited.
MedlinePlus lists several options that may minimize the appearance of scars: surgical revision, dermabrasion, laser treatments, injections, chemical peels, and creams. The right choice depends on the scar’s type, size, age, and location. A small stable scar may not need a procedure at all, while a thick or raised scar may respond better to treatment aimed at flattening or softening it.
For stretch marks, this source does not provide detailed treatment guidance, so expectations should stay modest. In general, skin products and procedures may make them less visible, especially when they are newer, but they usually do not erase them. A dermatologist can help sort out which options are worth trying and which are unlikely to help much.
- Treatment choice depends on the type of mark.
- Scar treatments may improve appearance, not erase the scar.
- Stretch-mark improvement is usually partial.
09 · Scars And Stretch Marks
When a scar or stretch mark needs medical attention
A stable mark is usually not urgent. A changing, painful, draining, or opening mark needs prompt review.
Get medical help soon if a scar becomes more painful, red, warm, swollen, or starts draining pus. A wound or incision that opens again should be checked, and so should a scar that keeps growing or becomes much more raised than expected. Those changes can point to infection, irritation, or a problem with healing rather than a normal scar.
A stable scar that only bothers you because of how it looks can usually wait for a routine visit. The same is true for stretch marks when they are old, stable, and not tied to other symptoms. The reason to be more cautious is not the mark alone; it is the combination of skin change plus symptoms, rapid growth, or a pattern that suggests another condition.
- Pain, heat, pus, or opening means the area should be evaluated soon.
- A scar that keeps enlarging may need earlier treatment.
- New stretch marks plus bruising, weakness, or body changes deserve a visit.
10 · FAQ
Questions people ask
Will my scar fade completely?
Usually not. Scars often fade over time and may become flatter, softer, or less visible, but they rarely go away completely. Treatment may improve how they look, especially for certain raised or early scars, but the goal is usually reduction, not full removal.
Is it normal for a scar to itch?
Mild itching can be part of healing, especially early on. What is less normal is itching together with worsening redness, warmth, swelling, pain, or drainage. If the itch is strong or the area looks inflamed, it is worth getting it checked.
Can I massage a scar?
Sometimes, but only after the skin is fully closed and a clinician says it is okay. Massage should not be used on open skin, scabs, or a scar that is red, hot, or draining. If massage makes it hurt more or look worse, stop and ask for advice.
Can sun make scars and stretch marks worse?
Yes. Sun can darken healing skin and make scars stand out more. Protecting healed skin with clothing and sunscreen can help limit color change. This matters most during the first months after an injury or surgery, when the skin is still changing.
Why did I get a raised scar after a small cut?
Some people have a stronger tendency to make raised scars because of inherited factors, skin response, and where the injury happened. A small wound can still leave a thick scar if it healed under tension, got irritated, or healed more slowly than expected.
Do stretch marks always mean something is wrong?
No. Stretch marks can happen during growth, pregnancy, weight change, or other times when skin stretches quickly. They are more concerning when they appear suddenly, spread quickly, or come with easy bruising, weakness, or major body changes that could point to a hormone or medicine issue.
11 · References
References and supporting evidence
These sources support the points identified below. Source checking is not clinical approval.
- S1: ScarsMedlinePlus / U.S. National Library of Medicine
Explains what a scar is and gives common causes such as cuts, scrapes, burns, sores, surgery, infections, and acne. Explains the typical look of scars and why a fresh scar can seem different from nearby skin. Explains the main factors that affect scar appearance, including wound depth, location, healing time, age, and inherited tendency. Explains the natural history of scars and why treatment is usually about improvement rather than total removal. Explains broad treatment categories a clinician may discuss for scars and that the aim is to minimize appearance.
General information, not a diagnosis. This guide is not a substitute for care from a qualified healthcare professional. For an emergency, call 911 in the US or your local emergency number. Illustrations are conceptual and are not diagnostic images.