Why Does Eczema Get Worse in the Fall? What's Changing in the Air (and on Your Skin)

When fall arrives, my skin gets drier and asks for more. I feel it. I see it.

So I respond. I layer body oil first, then body butter on the spots that need it most: my knees, my arms, my elbows. If your skin does the same thing every October, there's a reason.

October is also National Eczema Awareness Month, so let's talk about what's actually going on.

What changes in the fall

Several things stack up at once.

Drier, colder air. Picture your skin like a clay pot. A healthy pot holds water. A cracked pot, even with hairline fractures, loses water constantly, no matter how much you pour in. Eczema-prone skin is the cracked pot. Your barrier has microscopic gaps that let moisture escape all day long.

Fall's cold, dry air makes that harder. Researchers who reviewed the evidence on weather and skin found that low humidity and low temperatures reduce barrier function and make skin more vulnerable to friction. Skin also becomes more reactive to irritants and allergens, and cold, dry weather raises the risk of flares in people with atopic dermatitis, the most common type of eczema.

Seasonal allergens. Fall brings airborne triggers like ragweed pollen and mold from damp, decaying leaves, and dust mites live in many homes year-round. Researchers are still working out how big a role these play, but reviews have found they can set off flares in some people whose immune systems react to them. It doesn't happen to everyone. If your skin flares every fall, it's worth mentioning to your provider.

Rough or tight fabrics. Wool and tight synthetic layers can physically irritate sensitive skin. If a fabric is rough or doesn't let skin breathe, it can contribute to a breakout.

Slipping routines. When the weather turns, it's easy to moisturize less often or less thoroughly. Layers cover your knees, arms, and elbows, so it's easy to skip the spots no one sees. Dry skin then becomes more prone to flaring.

The shower habit I'm guilty of

I take longer, hotter showers in the fall. It feels good in the moment. Sometimes I do it just to stop myself from scratching. But the relief is temporary, and the aftermath is worse: drier, tighter, itchier skin.

If that's you too, lukewarm and shorter is the better trade.

Five habits for a fall skin ritual

1. Use the moisture window. Moisturize right after you bathe, while your skin is still damp, ideally within three minutes. I call it the moisture window. You may have heard it called the 3-minute rule. The National Eczema Association recommends moisturizing within three minutes of bathing or showering. Choose thicker formulas, like rich creams, butters, or ointments, over thin lotions, especially if your skin is chronically dry.
2. Keep showers lukewarm and short.
3. Add humidity at home. My son uses a humidifier in his dorm every year, and it helps.
4. Layer with cotton. Wear soft, breathable cotton directly against your skin and keep wool on the outside. In a 2006 study in the Journal of the American Academy of Dermatology, skin hydration was significantly higher after six weeks in cotton than in polyester.
5. Make it a ritual. Same steps, same order, every day. Mine is oil first, then butter, on the driest spots.

If your provider has prescribed a topical treatment, follow their directions for how and when to apply it, and ask them how to fit your moisturizer around it.

Quick answers

Why does my eczema get worse in the fall?
Cold, dry air weakens the skin barrier and makes skin more reactive. Fall allergens, scratchy fabrics, and a slipping routine can pile on.

What is the moisture window (the 3-minute rule)?
It's the time right after you bathe, while your skin is still damp, when sealing in moisture matters most. The National Eczema Association recommends applying a thick layer of moisturizer within three minutes of bathing or showering to lock in moisture and protect the skin barrier. Researchers describe the evidence for bathing and moisturizing this way as limited but supportive.

Are hot showers bad for eczema?
Many people find hot water leaves skin drier and itchier afterward. Lukewarm is the usual recommendation.

Can fall allergies make eczema worse?
For some people, yes. Reviews link airborne allergens like pollen, mold, and dust mites to flares in sensitized people.

When should I see a doctor?
If your skin is cracked, weeping, painful, or not improving, talk to a healthcare provider.

One thing to do this week: Save this post, or send it to someone whose skin does this every October.

Sources: Engebretsen et al., Journal of the European Academy of Dermatology and Venereology; Chong et al., Current Allergy and Asthma Reports (2022); Jung et al., American Journal of Rhinology & Allergy (2024); Cardona et al., Annals of Allergy, Asthma & Immunology 2016;117(1):9-13; Journal of the American Academy of Dermatology (2006), cotton vs. polyester study; National Eczema Association, "Bathing, Moisturizing and Wet Wraps."

This post is for general education, reflects the personal experience of the author, and isn't medical advice. Eczema looks different for everyone, so talk with your healthcare provider about what's right for your skin. Always patch test new products on a small area first.