In short. A stretch mark is a tear in the dermis and the scar tissue that closed it, not a mark on the surface of the skin. That single fact explains why no treatment restores the dermal fibres, and why every option is judged on how much better a mark looks.
Key points
- A stretch mark is a dermal scar, and no treatment puts dermal fibres back.
- Scar tissue holds less elastin and fewer supporting cells than normal dermis.
- A mark holds no hair follicles and no sweat glands.
- Surface products act through the epidermis and most never reach the dermis.
- Whether a mark is red or pale settles more of the plan than its size.
Where the mark actually is
Skin has layers. The epidermis on top is a thin, renewing sheet. Beneath it sits the dermis, a woven fabric of collagen and elastin that gives skin its strength and its recoil. A stretch mark is a tear in that fabric, and what closed the gap is scar tissue laid down in a line.
Run a finger across a stretch mark and it feels different from the skin beside it: smoother, faintly hollow, like a crease that has been pressed in. What you are feeling is not a coating on the surface, but the surface following the shape of a scar underneath it.
Why scar tissue behaves differently
Scar tissue holds less elastin, the protein that scatters light, and fewer supporting cells than a dermis does, so a mark reads paler and flatter than its surroundings. It holds no hair follicles and no sweat glands. It is a different tissue rather than a damaged version of the same one.
What can any treatment reach?
Anything applied to the surface has to act through the epidermis, and most of it never reaches the dermis, so moisturiser comforts the skin without rebuilding the fabric beneath. The treatments that do reach the dermis, such as microneedling and resurfacing devices, cause a controlled round of injury and repair, so change arrives over a course.
Why the surface language misleads
Stretch marks are usually described in the vocabulary of surfaces: creams that are absorbed, oils that restore, skin that is nourished. That language is comfortable and inaccurate. It invites the idea that a mark is a layer that could be lifted away or fed until it returns to normal.
Why does the stage decide the plan?
Whether a mark is still red or has gone pale settles more of the plan than its size does. A red mark is still being rebuilt and still has vessels in it; a pale one has finished, and the options that act on colour have nothing left to work with.
When should marks be seen by a doctor?
Marks that appeared while you were taking a steroid medicine, by mouth or on the skin, need a medical opinion. So do marks that came with weight gain around the middle, easy bruising or muscle weakness. Marks that came with unusual joint flexibility, or a family history of aortic problems, should also be reviewed rather than treated first.
What no treatment changes
No treatment available puts dermal fibres back. That is not a limitation of one device or one product. It is why every option here is judged on how much better a mark looks rather than on whether it is gone.
| Feature | Normal dermis | Stretch mark scar | What it means |
|---|---|---|---|
| Collagen and elastin | A woven fabric giving strength and recoil | Torn and replaced by scar tissue in a line | No treatment rebuilds the fabric |
| Elastin and supporting cells | Present through the dermis | Less elastin and fewer supporting cells | The mark reads paler and flatter |
| Hair follicles and sweat glands | Present | Absent | The surface over a mark behaves differently |
| Surface shape | Level with the surrounding skin | Follows the shape of the scar beneath | A mark can feel faintly hollow |
| Response to moisturiser | Comforts the epidermis | No rebuilding beneath | Most surface products never reach the dermis |
| Response to microneedling and resurfacing | A controlled round of injury and repair | Change arrives over a course | The mark is judged on appearance, not erasure |
Sources
Internal links
Frequently asked questions
Why does a stretch mark feel slightly hollow compared with the skin beside it?
Because the scar that filled the tear is thinner and less elastic than the dermis it replaced, so the surface above it dips. The hollow is a shape rather than a layer, and nothing rubbed into the skin fills it in. Where a mark sits deep enough to lose volume as well as fibres, that is one of the findings recorded at an assessment.
Why do some stretch marks look red at first and others never do?
A new scar carries a rich blood supply while it is being built, and in some people that shows as a red or purple colour. How strongly it shows varies with skin tone and with how quickly the mark matures. A mark that never looked red has simply passed through that phase quickly and reached the pale stage earlier than a red one.
Does a stretch mark have hair follicles or sweat glands in it?
No. Follicles and glands belonged to the skin that the scar replaced, and they do not re-form there. That is one of the clearest reasons a mark is a different tissue rather than a damaged version of the same tissue, and it is why the surface over a mark behaves unlike the skin around it.
Risks & Limitations
- No treatment removes a stretch mark. Improvement in colour and texture is the realistic aim.
- A mark that has already gone pale answers to far less than one that is still red.
- Change is judged from standardised photographs over months, not from the first weeks.
- Laser and light can leave pigment change, particularly in skin that darkens readily after injury.
When to Seek Care
- Marks that appeared while you were taking a steroid medicine, by mouth or on the skin.
- Marks with weight gain around the middle, easy bruising or muscle weakness.
- Marks with unusual joint flexibility, or a family history of aortic or heart valve problems.
- Blistering, spreading redness or increasing pain after a treatment on the skin.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.