Why Does My Skin Get More Reactive When the Weather Changes?

Skin that felt fine in September and now stings, flushes or flakes. The weather has turned, the heating has come on, and you're still wondering why your face seems to react to everything.

Why does skin get more reactive when the weather changes?

Cold weather, lower humidity, wind and heated indoor environments can all change what your skin is exposed to in winter. For someone whose skin already feels reactive, redness-prone or flaky-prone, those seasonal changes may coincide with more dryness, tightness or irritation. There's rarely a single cause, so here is what the research does and doesn't tell us.

What does winter do to facial skin?

A small study from Tohoku University measured the skin of 39 healthy Japanese women, aged 24 to 78, in late summer and again in winter, using non-invasive instruments. The authors reported significantly impaired barrier function in winter on both the cheek and the forearm, with a much larger difference on the cheek, the exposed site, and described raised transepidermal water loss (TEWL, a measure commonly used when assessing barrier function) on the face. Cheek surface temperature and redness readings were also higher in winter. The authors thought low-level inflammation, below the point of visible symptoms, may explain this, and their data suggest that exposed facial skin becomes more irritable in dry, cold conditions, even in healthy people.

Cheek hydration didn't change significantly between seasons, whereas forearm hydration was lower in winter. That suggests barrier measures and skin hydration don't always move together.

A 2025 laboratory study using a lab-grown model of the epidermis found that one hour of low-humidity air increased water loss and reduced the expression of some barrier-related proteins. That was a cell model, not people, so it points to a plausible mechanism rather than showing what happens on your face.

Neither study looked at people with rosacea or seborrheic dermatitis, so they can't tell us how much any one person's skin may change.

Is it only the cold?

The National Rosacea Society, a patient organisation, has surveyed people with rosacea about their triggers. These surveys are self-reported and fairly old, so they show what people notice, not proven cause. In a survey of 424 people, 56% said indoor heat had triggered a flare-up and 53% said hot baths had. In a separate survey of 683 people, cold outdoor temperatures were reported as a trigger by 46% of those in mild climates and 81% of those in severe-weather areas, and 79% of all respondents named wind.

The picture isn't simply “cold is bad”: people with rosacea also report indoor heat as a trigger.

Why can redness and flaking show up together?

Changes in barrier function and water loss can contribute to dryness and irritation, so redness and flaking may sometimes appear together. But they can also have other causes, including rosacea, seborrheic dermatitis, eczema and contact reactions, so the combination alone doesn't tell you which. Our guide on caring for skin when redness and flaking happen together covers this, and telling rosacea and seborrheic dermatitis apart covers the overlap. The Tohoku authors also note that conditions such as atopic dermatitis and psoriasis show a tendency to worsen in winter. See our article on atopic dermatitis (eczema).

What may help when the weather turns

None of this replaces medical care, but a few low-risk habits may reduce avoidable stress on the skin:

• Keep cleansing and moisturising simple, using products your skin already tolerates rather than introducing several new ones together. That makes it easier to tell what your skin is reacting to. See building a routine for reactive skin and cleansing without stripping the barrier. If you're checking labels, reading past the fragrance-free label may help.
• Go easier on water temperature. Lukewarm rather than hot for your face and shower. Hot baths were reported as a trigger by 53% of respondents in the survey above.
• Protect exposed skin from cold wind where practical, while avoiding fabrics or friction that irritate your skin. Covering the face with a scarf is one of the steps respondents in the National Rosacea Society surveys reported using.
• Keep SPF in. Daily broad-spectrum SPF 30 or higher stays in the routine in winter. UV doesn't disappear on cold or cloudy days.

If you use a prescribed treatment, keep using it as directed and don't change or stop it based on this article. Speak to your prescriber. If a new cosmetic product clearly causes persistent burning, marked redness or worsening irritation, stop using that product.

For the barrier itself, see what the skin barrier is and how to support a damaged skin barrier.

Is it the weather, or something else?

Persistent, painful, cracked, weeping or spreading skin, irritation around the eyes, or symptoms that don't settle with a simplified routine are worth a GP or dermatologist assessment. Seasonal flares can be a sign of conditions such as eczema or rosacea, which need a proper diagnosis.

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