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Stretch Marks
Stretch marks are parallel linear streaks that appear where skin has been stretched quickly, on the abdomen in pregnancy, the hips and thighs in puberty or weight change, and the arms with muscle gain. They are a particular kind of scar: an internal tear in the dermis, not an open wound, and they affect men and women alike.
When skin stretches faster than it can adapt
Skin stretches thanks to collagen and elastin in the dermis. When the body's surface grows faster than the dermis can keep up, during a growth spurt, pregnancy or rapid gain, these fibres are pulled past their limit and tear within the dermis, with no break in the surface skin. Hormones add to this: cortisol weakens the fibres and lowers their breaking point.
Why do stretch marks appear?
Stretch marks come from skin stretched faster than the dermis can adapt, on a terrain influenced by hormones. Rapid changes in size and a cortisol-weakened framework both contribute, which is why they can appear even without major weight change. Understanding the cause, and how fresh marks differ from old ones, guides what treatment can realistically do.
Stretching past the limit
Skin can stretch, but only so fast. When the surface expands more quickly than the dermis can adapt, the collagen and elastin fibres are pulled beyond their limit and rupture internally. The surface stays intact while the framework beneath tears, which is why a stretch mark is a scar without an open wound.
The role of hormones
Cortisol, the stress hormone that rises in pregnancy, puberty and certain conditions or treatments, weakens collagen and elastin and lowers the threshold at which they break. This is why stretch marks are not purely mechanical and can appear without dramatic weight change, and why pregnancy and adolescence are such common times for them.
Red phase versus white phase
Fresh stretch marks are red or purple and still inflamed, with small dermal vessels visible through the tear. Over time the inflammation fades, the vessels recede, and the mark turns a pearly white, a mature scar with little organized collagen. The colour tells you the stage, which matters for what treatment can achieve.
Common, normal and mixed
Stretch marks are extremely common and a normal response to how skin grows, not a flaw or a hygiene issue. They affect men and women alike, through puberty, weight change and muscle gain, not pregnancy alone. Framing them this way is accurate and removes the misplaced blame often attached to them.
How to Prevent
What Treatments Can Help With Stretch Marks?
Stretch marks evolve over time, and treatment depends partly on where they are in that process. Topical creams and nutricosmetics can support skin hydration and overall skin quality, but established stretch marks involve changes deeper within the skin and usually require a different approach if you want to address their appearance.
The colour of a stretch mark provides an important clue. Newer stretch marks are usually red or purple, while mature stretch marks gradually become white or silvery. This distinction can help determine which treatments are most appropriate.
Treating Red or Purple Stretch Marks
Red or purple stretch marks, known as striae rubrae, are still in an earlier stage and have a more prominent vascular component.
Vascular Laser
Because blood vessels contribute to their red or purple colour, vascular laser treatments can target this redness and help make the marks less visible.
Microneedling
Microneedling focuses more on texture. By creating controlled micro-injuries, it stimulates the skin’s repair response and collagen production. Radiofrequency can also be combined with microneedling to deliver energy deeper into the skin when additional collagen stimulation is desired.
Treating White or Silvery Stretch Marks
As stretch marks mature, they lose much of their red or purple colour and become white or silvery, known as striae albae. At this stage, treatment shifts away from vascular redness and focuses more on the texture and structural changes within the skin.
Fractional Laser
Fractional laser treatments create controlled micro-injuries that stimulate the skin’s repair process and collagen production, helping improve the texture of mature stretch marks.
Microneedling
Microneedling can also stimulate collagen production within established stretch marks. It may be combined with radiofrequency to deliver controlled energy deeper into the skin and further target changes in texture.
Injections
Regenerative treatments such as PRP and PRF, as well as collagen-stimulating injections, may be used to support tissue repair and collagen production and improve the texture and quality of the affected skin.
Personalized treatments for you.
Poly-L-Lactic Acid Injections
Calcium Hydroxylapatite (CaHA) injections
Platelet-Rich Plasma (PRP)
Platelet-Rich Fibrin (PRF)
Fractional Lasers
CO2 Laser
Vbeam Laser
Plasma Fibroblast Therapy
Sylfirm X
Morpheus8
Microneedling
