The Truth About Stretch Marks: Why They Form, Why They’re So Stubborn, and What Actually Works

Stretch marks are among the most common skin concerns in the world — and among the most misunderstood. Despite affecting an estimated 80% of people at some point in their lives, these distinctive lines remain shrouded in myths, frustration, and countless ineffective “miracle” products.

If you’ve ever felt self-conscious about stretch marks on your stomach, thighs, hips, breasts, or arms, you’re far from alone. And if you’ve tried creams, oils, and home remedies without success, that experience is nearly universal. The reality is that stretch marks represent actual structural damage to your skin — damage that topical products simply cannot repair.

But advances in aesthetic medicine now offer genuine solutions. Here’s what you need to know about why stretch marks form, why they’re so resistant to treatment, and what modern technology can actually do about them.

What Stretch Marks Really Are: The Anatomy of a Scar

To understand why stretch marks are so difficult to treat, you first need to understand what they actually are — and they’re not simply “stretched” skin.

Your skin consists of three primary layers: the epidermis (outer layer), the dermis (middle layer), and the hypodermis (deepest layer). The dermis contains collagen and elastin fibers that give your skin its strength, structure, and ability to snap back after being stretched. Think of these fibers as a mesh network that holds everything together.

When skin stretches faster than these fibers can accommodate, the collagen and elastin actually tear. This tearing happens in the dermis — beneath the surface — which is why stretch marks have that distinctive depressed, textured appearance that differs from surrounding skin. What you’re seeing isn’t stretched skin; it’s scar tissue that formed where the dermis ruptured.

This is also why stretch marks feel different to the touch than surrounding skin. Run your finger across a stretch mark and you’ll notice the texture change — that slightly indented, smoother, sometimes rippled quality that distinguishes it from healthy skin.

The Life Cycle of a Stretch Mark

Stretch marks don’t appear fully formed. They evolve through distinct stages, and understanding this progression helps explain both their appearance and treatability.

• Stage One — Striae Rubrae (Red/Purple Stage): Fresh stretch marks typically appear reddish, purplish, or pinkish depending on your skin tone. This coloring comes from blood vessels visible through the damaged, thinned skin. During this stage, marks may feel slightly raised and can be itchy. This is actually the most responsive stage for treatment, as the skin is still actively healing and more receptive to interventions that stimulate repair.
• Stage Two — Striae Albae (White/Silver Stage): Over months to years, stretch marks fade to a white, silver, or pale color that’s lighter than your natural skin tone. The blood vessels have receded, and the scar tissue has matured. The marks often appear more depressed and develop that characteristic wrinkled or striated texture. At this stage, they’re more challenging to treat — but not impossible.
• Color Variations by Skin Tone: It’s worth noting that stretch marks don’t look the same on everyone. On lighter skin, fresh marks tend toward red or purple before fading to silvery white. On darker skin, marks may appear darker than surrounding skin initially, eventually fading to a lighter shade. This variation matters for treatment planning, as certain technologies work differently on various skin tones.

Why You Got Stretch Marks: Common Causes

Stretch marks develop whenever skin stretches beyond its elastic capacity. Several circumstances commonly trigger this:

• Pregnancy: Perhaps the most well-known cause, pregnancy stretch marks (striae gravidarum) affect up to 90% of pregnant women, typically appearing during the third trimester when rapid belly expansion occurs. They commonly develop on the abdomen, breasts, hips, and thighs. Hormonal changes during pregnancy also affect skin elasticity, making stretch marks more likely.
• Rapid Weight Gain or Loss: Whether from lifestyle changes, medication side effects, or other factors, rapid fluctuations in body size stress the skin beyond its capacity to adapt. This affects both those gaining weight quickly and those who lose significant weight, as the skin that expanded may struggle to contract smoothly.
•  Growth Spurts: Adolescent growth spurts cause stretch marks in many teenagers, particularly boys experiencing rapid height increases and girls developing curves during puberty. These marks typically appear on the back, thighs, hips, and breasts.
• Bodybuilding and Rapid Muscle Gain: Building muscle quickly — especially in the shoulders, chest, biceps, and thighs — can outpace skin’s ability to accommodate the increased mass. This is particularly common among bodybuilders and athletes engaged in intensive strength training.
• Corticosteroid Use: Long-term use of corticosteroid medications or creams can decrease collagen production in the skin, making it more vulnerable to stretch marks even with normal stretching.
• Medical Conditions: Certain conditions like Cushing’s syndrome and Marfan syndrome affect connective tissue and hormone levels in ways that predispose individuals to stretch marks.
• Genetic Factors: If your parents developed stretch marks, you’re more likely to develop them too. Genetics influence skin elasticity, collagen production, and how your body responds to stretching.

Why Over-the-Counter Products Don’t Work

Walk through any pharmacy or beauty store and you’ll find dozens of creams, oils, and lotions claiming to prevent or eliminate stretch marks. The marketing is compelling. The results are almost universally disappointing. Here’s why:

• The Products Can’t Reach the Damage: Remember that stretch marks represent tears in the dermis — the middle layer of skin. Topical products primarily affect the epidermis, the outermost layer. No matter how luxurious the formula or how expensive the cream, it cannot penetrate deeply enough to repair structural damage in the dermis.
• Collagen in a Bottle Doesn’t Become Collagen in Your Skin: Many products tout collagen as an ingredient, but applying collagen topically doesn’t translate to collagen production in your dermal layer. Collagen molecules are too large to penetrate the skin barrier effectively. Your body must produce new collagen itself — which requires stimulation at the cellular level.
• Hydration Helps Appearance but Doesn’t Heal Structure: Keeping skin well-moisturized can temporarily improve the appearance of stretch marks by plumping the skin and improving light reflection. But this is a cosmetic effect, not a structural repair. The improvement disappears as the product absorbs.
• Prevention Claims Are Largely Unsupported: Despite widespread marketing, no topical product has been scientifically proven to prevent stretch marks. Some studies suggest that keeping skin well-hydrated may reduce severity, but the evidence is limited. When skin is going to stretch beyond its capacity, no cream can stop the underlying dermal damage from occurring.

This isn’t to say that skincare has no role — maintaining healthy, well-hydrated skin is always beneficial. But expecting a topical product to repair stretch marks is expecting it to perform at a depth it simply cannot reach.

Treatment That Actually Works: Reaching the Dermis

Effective stretch mark treatment requires reaching the dermal layer where the damage exists and stimulating your body’s own repair mechanisms. At Beverly Hills Aesthetics, Dr. Sam Assassa offers advanced treatments specifically designed to accomplish this.

• Laser Resurfacing: Fractional CO2 laser resurfacing represents one of the most effective treatments for stretch marks available today. The laser creates microscopic channels in the skin, triggering a controlled wound-healing response that stimulates new collagen and elastin production exactly where it’s needed. The “fractional” aspect means the laser treats a fraction of the skin surface at a time, leaving islands of untreated tissue that accelerate healing. Over a series of treatments, stretch marks become less visible as skin texture improves and depressed areas fill in.
• Nanofat Injection: This innovative treatment uses your body’s own fat — processed into tiny particles — to regenerate and rejuvenate damaged skin. Fat contains abundant stem cells and growth factors that promote tissue repair and regeneration. During the procedure, a small amount of fat is harvested from your own body, processed to create nanofat, and then precisely injected into the stretch mark areas. The regenerative components work to improve skin texture, elasticity, and overall quality.

What to Expect From Treatment

Managing expectations is essential for satisfaction with any aesthetic treatment. Here’s what realistic treatment looks like:

• Multiple Sessions: Both laser resurfacing and nanofat injection typically require a series of treatments to achieve optimal results. Stretch marks represent established scar tissue, and remodeling that tissue takes time and multiple interventions. Dr. Assassa will recommend a treatment plan based on your specific stretch marks — their age, severity, and location all influence the approach.
• Gradual Improvement: Results aren’t instant. You’re stimulating biological processes that unfold over weeks and months. Collagen remodeling continues for three to six months after each treatment. Patients typically notice progressive improvement with each session and continued enhancement between sessions.
• Significant Improvement, Not Complete Elimination: Even the most advanced treatments rarely eliminate stretch marks entirely — and anyone promising complete removal should be viewed skeptically. However, significant improvement in color, texture, and visibility is absolutely achievable. Many patients reach a point where stretch marks are no longer a source of self-consciousness, even if faint traces remain visible upon close inspection.
• Better Results on Newer Marks: Stretch marks in the red/purple stage respond more readily to treatment than mature white/silver marks. If you’re developing new stretch marks, seeking treatment sooner rather than later typically yields better outcomes.

Preventing New Stretch Marks: What You Can Control

While you can’t always prevent stretch marks — genetics and circumstances play significant roles — certain practices may reduce your risk:

• Maintain Steady Weight: Avoiding rapid weight fluctuations reduces skin stress. If you’re planning significant weight loss or muscle gain, gradual changes allow skin more time to adapt.
• Stay Hydrated: Proper hydration supports skin elasticity. While this won’t prevent stretch marks if skin stretches beyond capacity, well-hydrated skin maintains better resilience overall.
• Nourish From Within: A diet rich in vitamins C and E, zinc, and protein supports collagen production. What you eat affects your skin’s ability to repair and maintain itself.
• Consider Early Treatment: If you notice new stretch marks developing, particularly in the early red/purple stage, consulting with a specialist early may improve treatment outcomes.

Why Experience Matters in Stretch Mark Treatment

Stretch mark treatment requires understanding both the technology and the artistry of aesthetic medicine. Different areas of the body respond differently. Different skin types require adjusted approaches. Different stretch mark presentations call for different treatment protocols.

Dr. Sam Assassa brings over three decades of experience to every patient consultation. Since founding Beverly Hills Aesthetics in 1995, he has performed more than 25,000 aesthetic procedures and trained thousands of physicians worldwide in advanced techniques. As president of the American Association of Aesthetic Medicine and Surgery since 2006, he remains at the forefront of innovation in non-surgical aesthetic treatments.

Frequently Asked Questions About Stretch Mark Treatment

Are stretch marks permanent if left untreated?

Stretch marks do not disappear on their own, but they do fade naturally over time — typically from red or purple to a lighter silver or white tone. While the color change makes them less noticeable, the underlying textural change in the skin remains without targeted treatment.

Is laser resurfacing safe for all skin tones?

Fractional CO2 laser resurfacing can be used on a range of skin tones, but treatment parameters must be carefully adjusted based on your complexion. Certain laser settings that work well on lighter skin carry a higher risk of hyperpigmentation on darker skin tones. Dr. Assassa will evaluate your skin during your consultation and recommend the safest, most effective approach for you specifically.

How many laser sessions will I need to see results?

Most patients require a series of three to five sessions spaced four to six weeks apart, though this varies based on the age, severity, and location of your stretch marks. Newer marks in the red/purple stage often respond more quickly than mature white or silver ones.

What is the downtime after stretch mark laser treatment?

Most patients experience redness, mild swelling, and a sunburn-like sensation for a few days following fractional laser treatment. Full recovery is typically one to two weeks. Dr. Assassa will provide specific aftercare instructions to support healing and optimize results.

Can stretch marks on the abdomen after pregnancy be treated?

Yes — post-pregnancy stretch marks on the abdomen are among the most common concerns Dr. Assassa treats. Both laser resurfacing and nanofat injection can significantly improve their appearance. It's generally recommended to wait until you're finished breastfeeding before beginning treatment.

Does nanofat injection hurt?

The procedure involves harvesting a small amount of fat, which is performed under local anesthesia, so discomfort is minimal. The injection phase itself is well-tolerated by most patients. Any soreness at the harvest site typically resolves within a few days.

Schedule Your Consultation at Beverly Hills Aesthetics

Stretch marks may be common, but that doesn’t mean you have to live with them. Modern aesthetic medicine offers real solutions that address the actual dermal damage — not just surface-level cosmetic effects.

If stretch marks have affected your confidence or limited your wardrobe choices, a consultation with Dr. Sam Assassa can clarify your options. You’ll receive an honest assessment of what treatment can realistically achieve for your specific situation, along with a customized plan designed to deliver meaningful results.

Beverly Hills Aesthetics is located at 640 South San Vicente Boulevard, Suite 410, in Los Angeles. The practice is open Monday through Friday from 10:00 AM to 6:00 PM and Saturday from 10:00 AM to 4:00 PM. Virtual consultations are also available for those who prefer an initial remote evaluation. Call 424-284-8933 to schedule your consultation, or book online through the Beverly Hills Aesthetics website. Your skin tells your story — and you deserve to feel confident in every chapter.