Crepey Skin: Causes and How to Firm It Up

Crepey skin is thin, finely wrinkled skin that looks like crepe paper, most often on the arms, legs, neck and chest. It comes mainly from years of UV breaking down collagen and elastin, the natural thinning of aging skin, and sometimes large weight loss. Retinoids, alpha hydroxy acids and urea can improve its texture over several months, though none fully reverses it.

Below is what makes skin turn crepey, why it can show up in your 30s or after losing weight, the ingredients with real evidence behind them and how to use them on the body. Crepiness under the eyes has its own causes and fixes, which we cover in crepey skin under the eyes.

What is crepey skin?

"Crepey" is a description of how skin looks, and it isn't a medical diagnosis. It usually means skin that is thin, slightly loose and covered in very fine wrinkles that crinkle when you pinch or move it. That matches how DermNet describes intrinsically aged skin: dry, pale, thin and finely wrinkled, with sagging or laxity that can appear with movement because of lost elasticity. Crepiness is most obvious where skin is thin and moves a lot, such as the inner upper arms, the chest, the neck and the knees.

What causes crepey skin?

Crepey skin develops when the dermis loses the collagen and elastin that keep it thick and springy. Several things drive that loss, and they add up over time.

Sun damage

UV is the cause you can do the most about. DermNet explains that prolonged UV exposure from sunlight or sunbeds breaks down collagen and elastin in the dermis, causing skin to lose its elastic qualities, while abnormal elastic tissue builds up in its place. That helps explain why crepiness tends to show first on the forearms and chest, which see more sun than skin that is usually covered.

Aging and hormones

Intrinsic aging affects all skin, sun-protected or not. DermNet says its signs begin around 50 to 60 years of age, and earlier in women, which it attributes to the loss of estrogen's protective effect at menopause. The AAD adds that skin becomes drier with age and fine lines appear, which makes crepey texture easier to see.

Why do I have crepey skin at 30?

Early crepiness usually points to sun exposure, sometimes combined with weight change or very dry skin. DermNet notes that sun-driven elastic damage does not usually show until the fourth decade of life (your 30s), with cumulative UV exposure the most important risk factor. If you tanned a lot as a teenager or in your 20s, crepey forearms or chest in your 30s fit that pattern. Tanning beds count too: the AAD says every tan, from the sun or a tanning bed, prematurely ages your skin.

Why does skin get crepey after weight loss?

When fat volume drops quickly, skin that was stretched over it doesn't fully shrink back, and its internal structure changes. A 2021 study compared abdominal skin from 20 people who had lost a large amount of weight after bariatric surgery with skin from 20 people with severe obesity. In the weight-loss group, thick, organized collagen fibers were replaced by thin, misaligned and loosely arranged ones, and the authors said these changes help explain the skin changes doctors see after massive weight loss. A 2024 review of facial changes after weight loss found volume loss and increased skin laxity, and noted that research on GLP-1 weight-loss medications is still limited.

Topicals can improve the surface texture of this skin. Large folds of loose skin after major weight loss are a structural issue that creams won't tighten, and they are usually a conversation for a plastic surgeon.

What helps crepey skin?

The ingredients with evidence work in two ways: some rebuild the dermis slowly (retinoids, AHAs), and some hydrate and smooth the surface right away (urea, moisturizers). Using one from each group, plus sunscreen, covers both.

Retinoids

The clearest body-skin evidence for retinol comes from a randomized, double-blind trial in older adults (mean age 87). Researchers applied 0.4% retinol lotion to one arm and a plain lotion to the other, up to three times a week for 24 weeks. The retinol arm had significantly better fine-wrinkle scores and more procollagen and glycosaminoglycans, molecules that hold water in the skin. Prescription tretinoin goes further: DermNet notes that used for more than 6 months it can reduce fine wrinkling and sun-induced skin fragility. The AAD advises starting with the gentlest formula every other night, using it at night, and not using retinoids during pregnancy. Our guide to retinol for beginners has a full ramp-up plan.

Alpha hydroxy acids

AHAs such as glycolic and lactic acid exfoliate the surface and appear to affect the dermis too. In a pilot study, people applied a lotion with 25% glycolic, lactic or citric acid to one forearm and a placebo to the other for about 6 months. AHA-treated skin was about 25% thicker, with denser collagen and better-quality elastic fibers, and no inflammation. That was a high concentration in a small pilot study, so treat it as a sign of what AHAs can do, not a promise for any one lotion. Cleveland Clinic notes that glycolic acid increases sun sensitivity, so pair it with SPF 30 or higher, and that it is generally considered safe in pregnancy at low concentrations, though you should check with your provider first. For more, see glycolic acid benefits and how to use it.

Urea

Urea is a humectant and a gentle exfoliant, and its effect depends on strength. A 2021 review in Dermatology and Therapy summarizes it this way: 2% to 10% urea for moisturizing and barrier support, 10% to 30% for moisturizing plus keratolytic (smoothing) action, and 30% and above mainly as a keratolytic. For crepey arms and legs, a 10% urea lotion is a practical middle ground. Our guide to urea creams compares strengths in more detail.

How do I build a routine for crepey skin on my arms and body?

1. Morning: broad-spectrum SPF 30 or higher on arms, chest and neck whenever they are uncovered, as the AAD recommends for all exposed skin.
2. After showering: a urea or lactic acid body lotion.
3. Two or three nights a week: a retinol on the most crepey areas, building up as tolerated, with a plain moisturizer on top.
4. Don't stack actives on the same patch at first: alternate retinol nights with AHA nights to limit irritation; our guide to skincare ingredients not to mix explains why.
5. Give it time: the studies above ran 24 weeks and about 6 months, so judge results at three to six months, not three weeks.

If you smoke, quitting helps here too. The AAD notes that smokers who stop often notice their skin looks healthier.

Are there procedures for crepey skin?

Yes, for people who want more than topicals can give. DermNet lists resurfacing procedures such as chemical peels and laser, fillers, and surgery to remove redundant sagging skin among the options for aged skin. A board-certified dermatologist can tell you which suits the area and how much change to expect.

How can an app help with crepey skin?

Most crepey skin is on the body, which a face scan doesn't read, but two parts of an app are still useful. Pori's ingredient scanner (Pro) lets you scan a body lotion's barcode or photograph its label and see each ingredient flagged as beneficial, use with caution or avoid for your skin type, so you can check that a "firming" lotion actually contains urea, lactic acid or a retinoid. For the face and jawline, a selfie scan gives an Anti-aging & Elasticity score and before/after comparison, which helps you judge a retinoid over months.

An app is not a diagnosis. If skin thins suddenly, bruises or tears easily, or changes in a way that worries you, see a doctor.