New stretch marks typically appear as flat, slightly indented streaks with a pink or reddish hue. They’re often subtle at first, easy to mistake for a scratch or mild skin irritation, but they gradually widen, lengthen, and deepen in color over the following weeks. Knowing what to look for early on matters because the window for effective treatment is limited to the first few months.
What Early Stretch Marks Look Like
The earliest stage of a stretch mark starts as flattened, thinned skin with a pink tint. At this point, the mark may be small and narrow, almost like a fine line drawn across the skin. The surface often has a faintly wrinkled texture, similar to crepe paper, because the deeper layers of skin have already begun to tear even though the surface remains intact.
Over days to weeks, these pink lines enlarge in both length and width and shift to a reddish-purple color. This is the active, inflammatory phase. The marks may look slightly raised or puffy at their edges, and they feel different from the surrounding skin when you run a finger over them. They’re indented, sitting just below the level of normal skin, rather than being bumpy or raised.
On lighter skin tones, the progression from pink to reddish-purple is usually easy to spot. On darker skin tones, early stretch marks may appear as darker brown or grayish streaks rather than pink or red. The contrast with surrounding skin can be less obvious, which sometimes means they go unnoticed until they’ve been developing for a while.
Where They Show Up First
Early stretch marks appear wherever skin is being stretched most. During pregnancy, the abdomen is the most common site, followed by the breasts, hips, and buttocks. Roughly 47% of women develop stretch marks during pregnancy, and about 46% already had them beforehand from puberty or earlier weight changes.
During puberty, they tend to show up on the thighs, hips, buttocks, and upper arms in girls, and across the lower back and shoulders in boys experiencing rapid growth spurts. Weight gain from any cause tends to produce marks on the abdomen, inner thighs, and upper arms. If you’re building muscle quickly, the outer shoulders and upper chest are typical spots.
How They Feel Before You See Them
Many people notice a sensation before the visible marks arrive. The skin in the affected area often feels tight, dry, and itchy. During pregnancy, the abdomen tends to be the itchiest area as the skin stretches to accommodate growth. This itching isn’t just surface dryness. It signals that the elastic fibers in the deeper skin layer are under strain and beginning to break down.
Not everyone experiences itching, but if you notice a persistent itch in an area where your body is changing shape, it’s worth paying attention. Some people also describe a mild tingling or a sensation of warmth. These feelings can precede the visible pink lines by a few days to a couple of weeks.
How Stretch Marks Change Over Time
The reddish-purple phase is temporary. Over months to years, the color gradually fades. The marks lose their inflammatory redness and become pale, silvery, or white. On darker skin, they may settle into a shade lighter than your natural tone, making them more noticeable rather than less. The texture remains slightly wrinkled and indented, but the marks become flatter and less distinct as they mature.
This color shift represents a real change in the skin’s structure. During the early phase, blood flow to the area is increased as the body attempts to repair the torn fibers, which gives the marks their red or purple appearance. As that healing response slows, the marks lose their color but also lose much of their responsiveness to treatment. The mature, pale marks are essentially scar tissue.
Why the Early Phase Matters for Treatment
The reddish-purple stage is the only window when topical treatments have meaningful evidence behind them. Retinoid creams derived from vitamin A can improve the appearance of stretch marks that are less than a few months old by helping rebuild collagen, the structural protein that gives skin its firmness. This gradually makes the marks blend more closely with surrounding skin.
Once marks have faded to white or silver, retinoid creams are far less effective. The active blood supply and ongoing repair process during the early phase is what makes the skin responsive to treatment. Waiting until the marks have fully matured means the skin’s natural healing response has already wound down, leaving fewer biological processes for a treatment to work with. If you’re noticing new pink or red streaks and want to minimize their appearance, acting within those first few months gives you the best chance.
When Stretch Marks Signal Something Else
Most stretch marks are a normal response to rapid skin stretching and don’t indicate any health problem. However, stretch marks that are unusually wide, deep, and intensely colored, especially if they appear without an obvious explanation like pregnancy, growth spurts, or weight change, can be a sign of excess cortisol production. This is a hallmark of Cushing’s syndrome, a hormonal condition where the body produces too much of its primary stress hormone.
The key differences: normal stretch marks are relatively narrow and follow predictable patterns tied to body changes you can identify. Stretch marks from cortisol excess tend to be broader (sometimes wider than a finger), more deeply indented, and a vivid purple-red color. They may also appear on unusual sites like the face or in areas where you haven’t gained weight. If your stretch marks seem disproportionate to any body changes you’ve experienced, that’s worth a medical evaluation.