Sensitive Skin and Seasonal Change: How to Protect the Skin Barrier

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Seasonal changes, especially between winter and spring or between summer and autumn, represent a significant biological challenge for the skin, particularly for people with sensitive or reactive skin. Temperature fluctuations, wind, changes in humidity, pollution, and UV radiation directly affect the skin barrier's functionality, increasing the risk of dehydration, redness, inflammation, and discomfort.

Protecting the barrier during these periods means preserving the skin's hydrolipidic balance, modulating the inflammatory response, and maintaining cohesion between corneocytes. If you would like to learn more about the structure and functions of the barrier, you can find everything in the article dedicated to what the skin barrier is and how to repair it.

Why does skin get worse with seasonal changes?

During seasonal transitions, the body must adapt to new environmental conditions in a very short time. This is especially true for people with predisposed or already sensitized skin, as we explain in the article on what sensitive skin is and how to treat it.

• Temperature fluctuations: moving between warm environments and cold or ventilated air alters skin thermoregulation and reduces the skin's ability to retain moisture.
• Wind and dry air: they accelerate the evaporation of surface water (TEWL), causing dryness, itching, and redness.
• UV radiation: as daylight hours increase, especially in spring, the skin is more prone to oxidative stress and inflammation.
• Air pollution: fine particulate matter (PM2.5) penetrates the stratum corneum and alters the skin flora, aggravating inflammatory manifestations.
• Unstable microbiota: the climate affects the skin's bacterial composition, making it less resilient and more prone to dysbiosis and irritation.

The biological mechanisms involved

The skin barrier consists mainly of the stratum corneum, where a lipid matrix of ceramides, fatty acids, and cholesterol protects against external aggressors. During seasonal changes, this structure undergoes:

• Increased TEWL (transepidermal water loss)
• Reduced endogenous lipid synthesis
• Activation of subclinical inflammatory responses
• Decreased skin antioxidant defenses

Dermatological research has documented that in people with sensitive or atopic skin, these mechanisms are activated more intensely and earlier, predisposing the skin to erythema, flaking, and persistent discomfort.

The most common symptoms in spring and autumn

During transitional periods, sensitive skin shows typical signs that reflect a compromised barrier:

• Sudden, persistent redness: mainly localized on the cheeks, nose, and chin, caused by vasodilation and increased capillary reactivity to temperature changes.
• Stinging, burning, and a sensation of heat: occur when the barrier can no longer effectively filter irritating agents or sensitizing substances.
• Tightness and widespread dryness: indicate excessive transepidermal water loss, which makes the surface more fragile and prone to microfissures.
• Fine flaking or microcracking: especially on the cheekbones and forehead, where the skin struggles to maintain cellular cohesion due to a lack of lipids.
• Increased reactivity to usual cosmetics: even products tolerated during other times of the year may cause discomfort, burning, or erythema.
• Itching at night or after cleansing: linked to the breakdown of the hydrolipidic film that protects the superficial nerve receptors.

These signs should not be ignored: they indicate a damaged, hyperreactive barrier. To learn more about the most common causes of redness, you can read the article on redness-prone skin: remedies and prevention.

How to adapt your skincare routine

1. Gentle, balanced cleansing

Avoid harsh surfactants and opt for physiological cleansing mousses or oils. Double cleansing can help, provided it is properly balanced.

2. Toning with hydrating and rebalancing actives

Sulfur-rich hyperthermal water, such as Valdieri water, helps support the microbiota and quickly soothe redness and stinging.

3. Barrier cream with soothing actives

Recommended ingredients: biomimetic ceramides, bisabolol, hyaluronic acid with medium molecular weight, panthenol, mallow, marshmallow root, and calendula.

4. Targeted treatment during critical periods

A rebalancing serum can help during periods of increased sensitivity. Choose alcohol- and fragrance-free formulas enriched with thermal waters and antioxidant actives.

Mistakes to avoid

• Completely change your routine from one day to the next
• Use too many exfoliating actives (acids, retinoids)
• Expose yourself to the sun without protection during the first warm days
• Apply occlusive makeup without a protective barrier underneath

The most common mistake is reacting to worsening skin by adding more products. During seasonal changes, the opposite approach works: simplify. Fewer steps, richer formulas, and no new active ingredients introduced just when the skin is struggling.

The LeLang protocol

Step 1: Cleansing Gentle Oil followed by Cleansing Detox Mousse.

Step 2: Pro Age Thermal Water.

Step 3 (day): Lycoglow Serum, for radiance and antioxidant protection with a lightweight formula, also suitable for sensitive skin.

Step 3 (evening): 5 Complex Night Serum, to support the barrier and promote renewal with peptides and biotechnological active ingredients.

Step 4: Nutralight Sensitive, to lock in moisture, soothe, and rebalance the barrier.

Conclusion

Seasonal change is much more than a shift in the weather: it is a stress test for the skin, especially for those with sensitive skin. A weakened barrier causes not only cosmetic discomfort, but also greater susceptibility to inflammation and redness.

Adapting your routine does not mean changing everything, but carefully choosing a few targeted, well-tolerated products. Listening to your skin, recognizing the early signs of a barrier in distress, and responding gently are what allow you to face every seasonal change without setbacks.

Frequently asked questions

Why does my skin always get worse in spring and autumn?

Because these periods involve temperature fluctuations, changes in humidity, and greater exposure to pollutants and UV rays—all factors that place stress on the skin barrier.

How can I tell if my skin barrier is damaged?

Typical signs include tightness, itching, redness, flaking, and increased sensitivity to your usual cosmetics. They indicate elevated TEWL and a loss of cohesion between corneocytes.

Can I use the same products all year round?

Not always. Seasonal changes call for recalibration, with more hydrating and soothing formulas preferred during transition periods.

Should I stop using exfoliants?

If your skin is sensitized, it is advisable to reduce their frequency of use or temporarily stop using them, to avoid further compromising the barrier.

Which active ingredients are most suitable?

Ceramides, bisabolol, panthenol, medium-molecular-weight hyaluronic acid, and soothing thermal waters such as the sulfurous water of Valdieri.

Sources

• Proksch E et al., The skin: an indispensable barrier, Experimental Dermatology, 2008
• Elias PM, Stratum corneum defensive functions: an integrated view, Journal of Investigative Dermatology, 2005
• Misery L et al., research on the clinical, epidemiological, and pathophysiological aspects of sensitive skin
• Schikowski T et al., studies on the role of airborne particulate matter in skin aging