Stretch Marks: What They Are and What Can (and Can't) Be Done About Them

What are stretch marks, and why do they form?

Stretch marks (striae distensae) are scars in the dermis — the deep structural layer of skin beneath the surface. They form when the skin is stretched faster than it can adapt, causing the collagen and elastin fibers that give skin its resilience to tear.

Common triggers include: - Pregnancy - Rapid growth spurts during puberty - Significant weight gain or loss - Intense muscle building - Prolonged use of topical or systemic corticosteroids

Fresh marks (striae rubra) appear pink, red, or purple because the blood vessels beneath the damaged dermis are visible through thinned skin. Over months to years, they fade to a pale, silvery-white scar (striae alba). This shift matters clinically: early marks respond substantially better to treatment because active inflammation and tissue remodeling are still underway 1Ref 1Ud-Din S, McGeorge D, Bayat A (2016).Topical management of striae distensae (stretch marks): prevention and therapy of striae rubrae and albae.Early red marks (striae rubra) respond better to treatment than mature white marks (striae alba); overview of topical evidence including tretinoin.

What does the evidence actually support?

A 2024 systematic review of 4,806 treated cases found that energy-based devices (lasers and radiofrequency) were the most commonly used interventions and produced the most consistent improvements, followed by topical treatments and mechanical approaches 2Ref 2Zhu CK, Mija LA, Koulmi K, Barankin B, Mukovozov I (2024).A Systematic Review on Treatment Outcomes of Striae.Energy-based devices are most commonly used and most consistently effective; 4,806 treated cases reviewed; early marks respond better than mature marks. The honest summary: no treatment eliminates stretch marks, but several can make them significantly less noticeable.

### Topical retinoids (tretinoin)

Tretinoin (prescription retinoic acid) is the best-studied topical treatment for early, red stretch marks. In a double-blind, randomized, vehicle-controlled trial, patients applying 0.1% tretinoin daily for six months showed significant reduction in mark length and width compared with the vehicle group, with improvements evident at two months 3Ref 3Kang S, Kim KJ, Griffiths CE, et al. (1996).Topical tretinoin (retinoic acid) improves early stretch marks.Double-blind RCT showing significant reduction in stretch mark length and width with 0.1% tretinoin vs. vehicle over 6 months. A separate trial confirmed that 0.05% tretinoin cream and superficial dermabrasion both produced significant improvement in striae rubra from baseline 4Ref 4Lu H, Guo J, Hong X, Chen A, Zhang X, Shen S (2020).Comparative effectiveness of different therapies for treating striae distensae: A systematic review and network meta-analysis.Network meta-analysis of 14 RCTs (651 participants); tretinoin with radiofrequency showed highest probability of benefit; CO2 fractional laser ranked highest among laser treatments.

A broader systematic review concluded that tretinoin demonstrates variable but real therapeutic benefit in striae rubra, with limited effect on mature white marks 5Ref 5Ud-Din S, McGeorge D, Bayat A (2016).Topical management of striae distensae (stretch marks): prevention and therapy of striae rubrae and albae.Systematic review: tretinoin shows variable therapeutic results in striae rubra with limited effect on striae alba; limited evidence for most topical formulations. Tretinoin is contraindicated during pregnancy. It should not be used until after delivery.

### What the popular creams cannot do

Cocoa butter, vitamin E oil, and almond oil are heavily marketed for stretch marks — during pregnancy especially. A double-blind, randomized, placebo-controlled trial in 175 pregnant women found no difference in stretch mark development between daily cocoa butter lotion and placebo (45% vs. 49%; P = 0.730) 6Ref 6Osman H, Usta IM, Rubeiz N, Abu-Rustum R, Charara I, Nassar AH (2008).Cocoa butter lotion for prevention of striae gravidarum: a double-blind, randomised and placebo-controlled trial.RCT in 175 pregnant women: no significant difference in stretch mark development between daily cocoa butter lotion and placebo (45% vs. 49%; P=0.730). A Cochrane systematic review covering six trials and 800 women confirmed: there is no high-quality evidence supporting any topical preparation for preventing stretch marks in pregnancy 7Ref 7Brennan M, Young G, Devane D (2012).Topical preparations for preventing stretch marks in pregnancy.Cochrane review of 6 trials (800 women): no high-quality evidence for any topical preparation preventing stretch marks in pregnancy. These products are safe but should not be the primary plan.

In-office treatments a dermatologist can offer

### Fractional laser (ablative and non-ablative)

Fractional CO2 and non-ablative fractional lasers are among the most effective procedural options. A 2020 network meta-analysis of 14 randomized controlled trials found that CO2 fractional laser ranked highest among laser treatments, and combination approaches (topical tretinoin plus radiofrequency) showed the highest overall probability of benefit 8Ref 8Lu H, Guo J, Hong X, Chen A, Zhang X, Shen S (2020).Comparative effectiveness of different therapies for treating striae distensae: A systematic review and network meta-analysis.CO2 fractional laser ranked highest among laser treatments; combination of topical tretinoin plus bipolar radiofrequency showed highest overall probability of benefit (84.5%). Ablative and non-ablative fractional lasers can produce meaningful improvement in both color and texture across older and newer marks, though mature striae alba remain harder to treat.

### Pulsed dye laser (PDL)

The 585-nm pulsed dye laser targets the hemoglobin in dilated blood vessels under early red marks. A clinical study found moderate beneficial reduction in erythema in striae rubra, with no comparable improvement in striae alba 9Ref 9Jimenez GP, Flores F, Berman B, Gunja-Smith Z (2003).Treatment of striae rubra and striae alba with the 585-nm pulsed-dye laser.585-nm PDL showed moderate beneficial reduction in erythema in striae rubra; no clinical improvement in striae alba. PDL is particularly useful for the red discoloration phase of new marks.

### Microneedling

Microneedling — with or without radiofrequency — creates controlled micro-injuries that stimulate collagen remodeling in the dermis. A 2024 systematic review and meta-analysis of 11 studies (including six randomized controlled trials) confirmed that microneedling produces statistically significant improvement in striae distensae both as a standalone treatment and in combination with other therapies 10Ref 10Sun X, Jia X, Huang L (2024).Microneedling Therapy for Striae Distensae: Systematic Review and Meta-Analysis.Systematic review and meta-analysis of 11 studies (6 RCTs): microneedling produces statistically significant improvement in striae distensae as standalone and in combination; 60-70% improvement in striae rubra. The most pronounced results — up to 60–70% improvement — occur in early striae rubra; mature white marks respond more modestly.

### Platelet-rich plasma (PRP)

PRP is an emerging adjunct: evidence supports its use alongside laser or microneedling to enhance results, but data are limited compared with standalone laser or microneedling, and it is not a first-line option.

### Practical notes on all procedures

• Multiple sessions are required for every modality
• Results vary by skin tone, mark age, and body location
• Darker skin tones carry a higher risk of post-inflammatory hyperpigmentation with some laser settings; a dermatologist with experience across skin phototypes should calibrate treatment accordingly
• Most cosmetic stretch mark procedures are not covered by insurance — ask for pricing before committing to a multi-session plan

What does 'improvement' realistically look like?

Stretch marks are permanent scars. The goal of treatment is reduction in visibility — softening texture, evening color, and blending marks toward the surrounding skin. Complete removal is not an achievable outcome with any current treatment.

The more accurate expectation: with the right treatment started early, marks can become much less noticeable. A 2024 systematic review found that treatment of early red marks produced better outcomes than treatment of mature white marks across virtually every modality 2Ref 2Zhu CK, Mija LA, Koulmi K, Barankin B, Mukovozov I (2024).A Systematic Review on Treatment Outcomes of Striae.Energy-based devices are most commonly used and most consistently effective; 4,806 treated cases reviewed; early marks respond better than mature marks. If you are considering treatment, starting while marks are still pink or red offers the best chance of meaningful improvement.

Setting honest expectations before investing in expensive multi-session procedures prevents both financial and emotional disappointment.

When should stretch marks prompt a medical evaluation?

Most stretch marks are physiologic — a normal response to skin being stretched. They require no medical workup. However, certain patterns warrant clinical attention.

Striae associated with Cushing's syndrome (excess cortisol) tend to be wide, violaceous (deep purple), rapidly appearing, and located on the abdomen and flanks, often accompanied by weight gain concentrated in the trunk, easy bruising, fatigue, and blood pressure changes. The Endocrine Society clinical practice guideline identifies wide purple striae as a discriminatory feature of Cushing's syndrome 11Ref 11Nieman LK, Biller BMK, Findling JW, et al. (2008).The Diagnosis of Cushing's Syndrome: An Endocrine Society Clinical Practice Guideline.Wide, violaceous striae identified as discriminatory clinical feature of Cushing's syndrome; guideline on diagnostic testing (urine cortisol, late-night salivary cortisol, dexamethasone suppression). In a young person with this pattern and no obvious trigger (no pregnancy, no rapid weight change, no corticosteroid use), a primary care evaluation and cortisol testing are appropriate.

Corticosteroid-induced striae tend to appear in areas where cream was applied (axilla, groin, skin folds) or are diffuse in those on systemic steroids. They tend to be more atrophic, with noticeably thinned surrounding skin. Addressing the underlying indication for the corticosteroid, if possible, is part of the management.

What to expect at a dermatologist visit

A board-certified dermatologist will assess the age and type of your marks, your skin tone (Fitzpatrick phototype), and your goals. Treatment recommendations depend on whether marks are still red or have already matured to white, whether the skin is in an area easily treated by laser, and your budget and available treatment sessions.

Useful things to bring or share: - Photos in natural light showing the color and distribution of marks - Timeline of when they appeared and what prompted them (pregnancy, weight change, puberty, corticosteroid use) - A list of any topical or oral corticosteroid products used - Honest budget range — so the clinician can recommend a plan you can actually complete

Questions worth asking: - Based on the age and type of my marks, which treatment gives the best result for my skin tone? - How many sessions would I realistically need, and what is the total cost? - Is there any risk of making the marks worse — particularly post-inflammatory hyperpigmentation? - Should any of my marks prompt further evaluation for an underlying cause?