Yes, eczema typically gets worse in winter. In a large survey of over 1,300 people with eczema, 47% of those with mild eczema and 62% of those with severe eczema identified cold weather as a trigger for flares. The combination of cold outdoor air, low humidity, and indoor heating creates conditions that weaken the skin barrier and set the stage for itching, cracking, and inflammation.
Why Cold Weather Weakens Your Skin Barrier
Your skin’s outermost layer acts as a seal, holding moisture in and keeping irritants out. Low humidity and low temperatures directly weaken that seal. When the barrier is compromised, your skin loses water faster, dries out, and becomes more reactive to irritants and allergens. The skin cells themselves release stress signals and inflammatory compounds in cold, dry conditions, and the number of immune-reactive cells in the deeper skin layers increases. This means your skin isn’t just drier in winter; it’s also primed to overreact to things that might not bother it in warmer months.
Researchers measure barrier function by tracking how quickly water escapes through the skin, a metric called transepidermal water loss. Multiple studies confirm that this water loss increases significantly in fall and winter compared to summer. One study found water loss in winter was nearly double the summer rate (18.2 vs. 9.9 grams per square meter per hour). For someone with eczema, whose barrier is already impaired, that accelerated moisture loss can tip the balance from manageable dryness into a full flare.
Indoor Heating Makes It Worse
Cold air outside is only half the problem. Forced-air heating systems, radiators, and space heaters all strip moisture from indoor air. You might step inside to warm up, but the heated environment can drop indoor humidity well below comfortable levels, continuing the assault on your skin barrier even when you’re out of the cold. The constant cycling between frigid outdoor air and dry heated rooms is especially harsh, because your skin never gets a chance to stabilize.
Research on people with eczema who moved into homes with better air exchange and optimized temperature control showed significant improvement in their skin condition over a two-year period, compared to a control group that stayed in their original homes. This suggests that the indoor environment plays a measurable role in how eczema behaves during colder months, not just outdoor exposure.
Winter Clothing and Fabric Irritation
Bundling up in heavy layers introduces another trigger: mechanical irritation from coarse fabrics. Wool and rough synthetic fibers can scratch and inflame skin that’s already compromised. The discomfort from these fabrics isn’t purely about the material itself. It depends on how dry your skin is and how much water your barrier is losing. In winter, when both of those factors are at their worst, the same sweater that felt fine in October can become unbearable by January.
Layering with soft, breathable fabrics like cotton or silk closest to the skin, and saving heavier knits for outer layers, reduces direct friction against vulnerable areas. Washing new clothes before wearing them also helps remove chemical residues from manufacturing that can irritate sensitized winter skin.
How to Protect Your Skin Through Winter
The single most effective thing you can do is switch to a heavier moisturizer. Lotions contain more water and less oil, so they evaporate quickly in dry air and offer minimal protection. Creams contain a higher ratio of oil to water and hold moisture in longer. Ointments go a step further by forming a physical layer over the skin that blocks water loss and reinforces the barrier. If your skin tolerates ointments (some people dislike the greasy feel), they outperform creams and lotions in cold, dry conditions.
Timing matters as much as the product you choose. Applying moisturizer immediately after bathing, while your skin is still damp, traps that surface moisture underneath the cream or ointment. For stubborn winter flares, a technique called “soak and smear” can be particularly effective: soak in plain lukewarm water for 20 minutes before bedtime, then apply your prescribed ointment directly onto wet skin. In clinical use, this approach has led to dramatic improvement even in cases that weren’t responding well to ointment alone. It’s messy (old pajamas are recommended), but it works by maximizing how much moisture the skin absorbs and retains overnight.
For bathing in general, lukewarm water is better than hot. Hot showers feel good on cold days but strip oils from the skin and can trigger itching. There’s no firm consensus on the perfect bath duration, but keeping showers or baths relatively short and following up immediately with moisturizer is a widely recommended approach.
Managing Indoor Humidity
A humidifier in your bedroom or main living space can counteract the drying effect of heating systems. The National Eczema Society recommends keeping indoor humidity between 30% and 60%. Below 30%, the air pulls moisture from your skin too aggressively. Above 60%, you risk encouraging mold and dust mites, both of which can trigger eczema through a different pathway. A simple hygrometer (available for a few dollars at most hardware stores) lets you monitor levels and adjust your humidifier accordingly.
Placing the humidifier in the room where you sleep gives you the longest continuous exposure during the hours when your skin is doing its most active repair work. If you use a “soak and smear” routine, running a humidifier overnight amplifies the benefit by keeping the air around you from pulling moisture back out of your skin while you sleep.
Why Some People Flare in Summer Instead
Winter is the more common trigger, but it’s not universal. In the same survey data, 19% of people with mild eczema and 45% of those with severe eczema reported warm weather as a cause of flares. Heat, sweat, and higher pollen counts can all provoke eczema through different mechanisms. If your eczema consistently improves in winter and worsens in summer, your triggers may lean more toward sweat and heat sensitivity than barrier dryness. Tracking your flare patterns across seasons helps you and your care team identify which environmental factors matter most for your skin specifically.