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 skin gets worse during 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 disrupts the skin's thermoregulation and reduces its ability to retain moisture.
• Wind and dry air: 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 particles (PM2.5) penetrate the stratum corneum and alter the skin flora, worsening inflammatory manifestations.
• Unstable microbiota: the climate influences the skin's bacterial composition, making it less resilient and more prone to dysbiosis and irritation.

The biological mechanisms at play

The skin barrier consists primarily 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
• Reduced 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 of 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: these 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 familiar cosmetics: even products tolerated at other times of the year can 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 the causes of skin redness.

How to adapt your skincare routine

1. Gentle, balanced cleansing

Avoid harsh surfactants and choose physiological cleansing mousses or oils. Double cleansing can help, provided it is well balanced.

2. Toning with hydrating and balancing 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 a medium molecular weight, panthenol, mallow, marshmallow, and calendula.

4. Targeted treatment during critical periods

A balancing 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 changing your routine overnight
• Using too many exfoliating actives (acids, retinoids)
• Exposing yourself to the sun without protection during the first warm days
• Applying 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 while the skin is already 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 seal in moisture, soothe, and rebalance the barrier.

Conclusion

A 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 struggling barrier, 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 stress the skin barrier.

How can I tell if my skin barrier is damaged?
Typical signs include tightness, itching, redness, flaking, and increased sensitivity to products that are usually well tolerated. 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 moisturizing and soothing formulas preferred during transitional periods.

Should I stop using exfoliants?
If the skin is sensitized, it is advisable to reduce their frequency of use or temporarily discontinue 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 atmospheric particulate matter in skin aging