Ashy Skin: What Causes It and How to Get Rid of It (Legs, Knees, Butt)
★ TL;DR
Ashy skin is visible dry skin that looks whitish or gray, especially on deeper skin tones. Take 5 to 10 minute warm showers, pat dry and apply a fragrance-free cream or ointment to damp skin right away. Exfoliate gently once or twice a week at most, and see a dermatologist if it lasts past two weeks.
Updated September 2026
Ashy skin is dry skin whose flaky outer layer looks whitish or gray, and it's especially visible on deeper skin tones. It's usually caused by dry air, hot or long showers, harsh soap and not moisturizing soon enough. The fix is mostly moisture: short warm showers, a fragrance-free cream or ointment on damp skin right after, and gentle exfoliation now and then.
What is ashy skin?
"Ashy" isn't a medical diagnosis. It's the everyday word for dry skin you can see. The American Academy of Dermatology (AAD) notes that on melanin-rich skin, dry skin is often visible, with a whitish or grayish-white appearance.
What's happening underneath: DermNet explains that dry skin lacks moisture in the outermost layer (the stratum corneum), which leaves the surface dull, rough and scaly. Those lifted flakes don't reflect light the way smooth, hydrated skin does, so skin looks chalky.
It shows up most on:
- Shins and lower legs, which DermNet says are the most commonly affected spot
- Knees and elbows
- Hands and feet
- Butt and thighs, especially where clothes rub
Ashy skin isn't the same as skin that's darker in one area. If a patch looks darker rather than gray, see why is my butt darker.
What causes ashy skin?
| Cause | Why it dries skin out | What to change |
|---|---|---|
| Cold, low-humidity air and indoor heat | Dry air pulls water from the skin's surface | Run a humidifier, especially in your bedroom |
| Hot water and long showers | Strip the skin's natural oils | Keep showers to 5–10 minutes in warm water |
| Soap and harsh cleansers | Remove the lipids that hold moisture in | Switch to a gentle, fragrance-free cleanser |
| Rubbing dry with a towel | Adds friction and removes all the water | Pat dry and leave skin slightly damp |
| Waiting to moisturize | Water on the skin evaporates | Moisturize immediately after toweling off |
| Lotion instead of cream | Lotions are lighter and less effective | Use a cream or ointment |
| Tight or scratchy fabrics | Friction and irritation | Choose loose-fitting cotton |
Other factors are harder to change. DermNet lists age (dry skin is nearly universal after 60), certain medications such as retinoids and diuretics, and health conditions including hypothyroidism, chronic kidney disease and atopic dermatitis.
How do you get rid of ashy skin fast?
Moisturizer changes how ashy skin looks almost immediately. Keeping it from coming back takes a routine. These steps come from the AAD's dermatologists' tips for dry skin and its advice for darker skin tones.
- Take a short, warm shower of 5 to 10 minutes. Close the bathroom door to keep the steam in.
- Use a gentle, fragrance-free cleanser, just enough to clean without a big lather. Pick "fragrance-free" rather than "unscented."
- Pat, don't rub. Leave a little water on your skin so it feels damp.
- Moisturize immediately. The AAD says creams and ointments work better than lotions. For very dry skin, it suggests petroleum jelly or a thick cream.
- Look for helpful ingredients. The AAD points to ceramides for the grayish look on darker skin, and lists glycerin, hyaluronic acid, lactic acid, jojoba oil, shea butter, dimethicone, lanolin, mineral oil and petrolatum among ingredients that help dry skin.
- Reapply during the day whenever skin feels dry, including after washing your hands.
- Run a humidifier at night when the air is dry.
A quick fix before you head out: a thin layer of cream or ointment rubbed well into ashy knees, elbows or shins will make them look smoother within minutes.
Should you exfoliate ashy skin?
Yes, gently and occasionally. Exfoliation lifts the loose flakes that make skin look gray, but the AAD notes that exfoliating is also drying, so moisturize immediately afterward. Moisture comes first. Exfoliation is the supporting step.
Two AAD cautions shape how to do it:
- Dry skin may do better with mild methods. The AAD suggests a washcloth and a mild chemical exfoliant for dry or sensitive skin, since scrubbing may be too irritating. A lactic acid moisturizer does double duty here.
- Darker skin tones should avoid strong exfoliation if they get dark spots after irritation. Light pressure isn't optional.
If you prefer a scrub, Becky Booty Scrub is one option for once- or twice-weekly use. It's a walnut shell scrub in a sulfate-free base with glycerin, aloe leaf juice, provitamin B5, and jojoba, rosehip and sunflower seed oils. Use a small scoop on damp skin with light circles, rinse with lukewarm water and moisturize right away. It exfoliates flaky surface skin so skin looks and feels smoother, but it's not a substitute for moisturizer. Skip any scrub on cracked, itchy or irritated patches. For technique on legs specifically, see how to exfoliate your legs.
What's the best winter routine for ashy legs, knees and butt?
| When | Legs and shins | Knees and elbows | Butt and thighs |
|---|---|---|---|
| Every shower | Warm water, 5–10 minutes; shave at the end, when skin is softest | Gentle cleanser only | Gentle cleanser; skip bar soap |
| Right after | Thick cream on damp skin | Cream, then a thin layer of ointment | Cream on damp skin |
| Once or twice a week | Gentle exfoliation, then moisturizer | Washcloth or gentle exfoliation | Gentle exfoliation, then moisturizer |
| At night | Humidifier in the bedroom | Ointment on the roughest spots | Loose cotton sleepwear |
| During the day | Reapply if skin feels tight | Reapply as needed | Loose cotton underwear; change out of sweaty clothes |
For a full butt routine, see our butt skincare routine. If your skin stings with most products, start with the sensitive-skin version.
When is dry, ashy skin a sign of something else?
Most ashy skin is just dry skin. But the AAD says to see a board-certified dermatologist if your dry skin hasn't improved after about two weeks of home care, because conditions like eczema, ichthyosis or psoriasis may need prescription treatment.
Also get checked if you notice:
- Itch that keeps you up at night
- Deep cracks that bleed, or signs of infection like oozing, crusting or spreading redness
- Thick, scaly or inflamed patches rather than light flaking
- Dry skin that appeared alongside a new medication or other new symptoms. DermNet notes that retinoids, diuretics, hypothyroidism and kidney disease can all cause dry skin.
- Small rough bumps rather than flat flakes. That may be keratosis pilaris, covered in KP on the butt.
FAQ
Why is my skin ashy all of a sudden?
The usual triggers are a change in season (heating on, drier air), hotter or longer showers, a new soap, or skipping moisturizer. New medications can also dry skin. If it appears suddenly with no obvious cause, or doesn't improve within about two weeks of better habits, see a dermatologist.
Does lotion or oil work better for ashy skin?
Usually neither is best. The AAD says creams and ointments are more effective than lotions, and its dermatologists note that butters and oils tend to liquefy on skin, which makes them less effective moisturizers for very dry skin. An oil can add shine over a cream, but a thick cream or ointment on damp skin does the main work.
Can drinking water fix ashy skin?
Not on its own. A 2018 systematic review found only weak evidence: slight increases in skin hydration after drinking more water, mostly in people who drank little to begin with. Drink enough for your health, but the fixes dermatologists recommend for dry skin are bathing and moisturizing habits.
Why do my legs get ashy after showering?
Hot water and long showers strip oils, soap removes more, and rubbing with a towel finishes the job. Then the water left on your skin evaporates. Shorter, warmer showers, a gentle cleanser, patting dry and moisturizing right away usually solve it.
How often should you exfoliate ashy skin?
Once a week is a good start, and twice a week at most if your skin stays comfortable. Always moisturize right after, and skip exfoliating on cracked, itchy or irritated skin. The AAD's rule is that the more aggressive the exfoliation, the less often you should do it.
Smoother, softer, better-looking skin. Three scrubs a week.
The Becky Booty Scrub — walnut shell + rosehip exfoliant, $19.95, ships free over $35.
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