Cellulite and stretch marks are two completely different skin conditions that happen to show up in many of the same places, like the thighs, hips, and buttocks. Cellulite is a dimpled, bumpy texture caused by fat pushing against connective tissue bands beneath your skin. Stretch marks are linear tears in the deeper layer of skin caused by rapid stretching. They look different, form through different mechanisms, and respond to different treatments.
How Cellulite Forms
Beneath your skin, fat cells sit in small chambers created by bands of connective tissue (called septae) that run between your skin and the muscle underneath. In women, these bands run straight up and down, perpendicular to the skin’s surface. In men, they crisscross at 45-degree angles. That structural difference is a big reason cellulite affects an estimated 80% to 90% of women after puberty but is relatively uncommon in men.
When these connective tissue bands thicken, stiffen, or pull unevenly on the skin, they create depressions. Fat between the bands pushes upward into weakened skin, producing the classic “orange peel” or mattress-like texture. For years, researchers assumed the fat itself was the primary problem, but more recent imaging studies show that the dimples actually line up with thick, rigid bands pulling the skin downward. The fat bulging is a secondary effect. This is why cellulite can appear on people at any weight.
How Stretch Marks Form
Stretch marks happen one layer deeper into the story. When skin expands faster than the dermis (the thick middle layer) can keep up with, the collagen and elastin fibers that give skin its strength and bounce literally rupture. Immune cells rush in and break down elastic tissue in the mid-dermis, followed by a reorganization phase where collagen reforms into dense, scar-like bundles. The result is a permanent linear streak, essentially a scar from the inside out.
Hormones play a significant role. Rapid skin expansion alone doesn’t always produce stretch marks. Elevated levels of stress hormones (corticosteroids) can impair the cells responsible for building collagen, making the dermis weaker and more vulnerable to tearing. Research on stretch mark tissue has found that estrogen, androgen, and glucocorticoid receptor activity is significantly elevated in affected skin compared to normal skin, suggesting that hormonal surges make certain areas more susceptible. This explains why stretch marks cluster around pregnancy, puberty, and periods of rapid weight change, all times when both physical stretching and hormonal shifts happen simultaneously.
What Each One Looks Like
The visual difference is straightforward once you know what to look for. Cellulite appears as uneven, dimpled skin with a bumpy texture. It doesn’t change color. It may be visible all the time, or it may only show up when you pinch the skin or stand up. A common grading system breaks it into stages: Grade I only appears when you pinch, Grade II shows when standing but disappears lying down, and Grade III is visible in any position.
Stretch marks are distinct lines or streaks. New ones (striae rubrae) appear reddish or purple, feel slightly raised, and have increased blood flow to the area. Over time they mature into older stretch marks (striae albae), which fade to a whitish or silvery color, flatten out, and develop a rougher surface texture than surrounding skin. At this stage the skin is thinner, with less blood supply and a loss of the normal ridged pattern you’d see under magnification.
Where They Typically Appear
Both conditions favor the thighs, hips, and buttocks, which is partly why people confuse them. But they also diverge. Cellulite is most concentrated on the outer thighs and buttocks because that’s where women’s fat distribution and connective tissue architecture create the strongest conditions for dimpling.
Stretch marks follow wherever skin has been stretched most. During pregnancy, that’s the abdomen, breasts, and hips. During adolescent growth spurts (which produce stretch marks in anywhere from 6% to 86% of teenagers, depending on the population studied), they commonly appear on the thighs, lower back, and upper arms. Bodybuilders often get them on the shoulders and chest. The pattern always traces back to where rapid expansion happened.
Who Gets Them
Cellulite is overwhelmingly a female condition due to the perpendicular orientation of connective tissue bands in women’s skin. Body weight influences severity but doesn’t determine whether you get it. Thin women develop cellulite regularly. Genetics, skin thickness, and the specific architecture of your connective tissue bands matter more than body fat percentage.
Stretch marks are more equal-opportunity. They affect people of all genders during growth spurts, weight fluctuations, pregnancy, and muscle gain. Genetic predisposition plays a clear role: if your parents have prominent stretch marks, you’re more likely to develop them. A deficiency in fibrillin, a protein that provides scaffolding for elastic fibers, has also been identified as a contributing factor in some people.
Treatment Options for Cellulite
Because cellulite is fundamentally a problem of rigid connective tissue bands pulling skin inward, the most effective treatments target those bands directly. Subcision, a procedure that cuts or disrupts the bands beneath a dimple, has the strongest evidence. This can be done with a small blade, a laser, an enzyme injection that dissolves collagen, or acoustic energy (high-frequency sound pulses that shear the bands without an incision).
In a clinical trial of 56 participants who received a single acoustic subcision treatment, cellulite severity dropped by about 30% at 12 weeks. Blinded reviewers correctly identified the improved post-treatment photo 96% of the time, and over 90% of treated sites were rated as visibly improved. Skin laxity also improved by roughly 28%. Vacuum-assisted subcision is the only method so far that has demonstrated durable long-term results.
Topical creams, massage, and dry brushing may temporarily plump the skin or increase circulation, but none of them address the structural bands underneath. They can smooth the appearance briefly without changing the underlying cause.
Treatment Options for Stretch Marks
Stretch marks are scars, and like all scars, they’re easier to treat when they’re fresh. Early red or purple stretch marks still have active blood flow and ongoing tissue remodeling, which makes them more responsive to treatment. Older white stretch marks, where the tissue has already reorganized into dense scar-like collagen, are harder to improve significantly.
Fractional laser treatments have shown the strongest results. Studies have found that fractional CO2 laser produces a greater decrease in stretch mark surface area compared to topical therapy with glycolic acid and tretinoin combined. The laser works by creating tiny columns of controlled damage in the skin, triggering a healing response that remodels collagen. For newer stretch marks, laser therapy takes advantage of the existing increased blood supply to the area. For older ones, results are less consistent, though some patients with mature stretch marks have still shown improvement after multiple sessions spaced about four weeks apart.
Topical retinoids can help with newer stretch marks by stimulating collagen production, but they’re not recommended during pregnancy (when many stretch marks first develop) and they work slowly. No topical product has been shown to fully eliminate established stretch marks.
Can You Have Both at Once?
Yes, and many people do. The thighs and buttocks are prime territory for both conditions, and having one doesn’t protect against or cause the other. They’re independent processes happening at different levels of the skin. Cellulite involves the connective tissue bands and fat chambers beneath the dermis. Stretch marks are tears within the dermis itself. You could have dimpled skin with stretch marks running across it, and each would need its own approach if you wanted to treat them.