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

[INDICE:h2]

Seasonal changes, especially from winter to spring or summer to fall, pose a significant biological challenge for the skin, particularly for those with sensitive or reactive skin. Temperature fluctuations, wind, humidity changes, pollution, and UV radiation directly affect the skin barrier's function, increasing the risk of dehydration, redness, inflammation, and discomfort.

Protecting the barrier during these periods means preserving the skin's moisture balance, modulating the inflammatory response, and maintaining cohesion between corneocytes. For more information about the structure and functions of the barrier, see our article on what the skin barrier is and how to repair it.

Why skin gets worse with seasonal changes

During seasonal transitions, the body has to adapt to new environmental conditions in a very short time. This is especially true for those with skin that is predisposed or already sensitized, 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 skin thermoregulation and reduces the skin's ability to retain moisture.
• Wind and dry air: speed up 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) can penetrate the stratum corneum and alter the skin flora, worsening inflammatory symptoms.
• Unstable microbiota: the climate affects 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 mainly of the stratum corneum, where a lipid matrix of ceramides, fatty acids, and cholesterol protects against external aggressors. During seasonal transitions, this structure undergoes:

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

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

The most common symptoms in spring and fall

During seasonal transitions, sensitive skin shows typical signs of a compromised barrier:

• Sudden, persistent redness: mainly 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 out irritants or sensitizing substances.
• Tightness and widespread dryness: indicate excessive transepidermal water loss, which makes the skin’s surface more fragile and prone to microcracks.
• Fine flaking or microcracks: especially on the cheekbones and forehead, where the skin struggles to maintain cellular cohesion due to a lack of lipids.
• Increased sensitivity 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 superficial nerve receptors.

These signs shouldn’t be ignored: they may indicate a weakened, hyperreactive skin barrier. To learn more about the most common causes of redness, read the article on redness: what to do to soothe it.

How to adapt your skincare routine

1. Gentle, balanced cleansing

Avoid harsh surfactants and choose gentle foams or cleansing oils. Double cleansing can help, as long as it’s well balanced.

2. Toning with hydrating and balancing actives

A hyperthermal sulfurous water, such as Valdieri water, helps support the microbiome 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-free formulas with low-persistence fragrance, enriched with thermal waters and antioxidant actives.

Mistakes to avoid

• Changing your entire routine overnight
• Using too many exfoliating actives (acids, retinoids)
• Sun exposure without protection on the first warm days
• Applying occlusive makeup without a protective barrier underneath

L'The most common mistake is to react to worsening skin by adding products. When the seasons change, the opposite approach works: simplify. Fewer steps, richer formulas, and no new active ingredients introduced just when your 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, as the final step of your evening routine, to nourish and support the skin barrier with a blend of five plant oils, including organic rosehip and argan oils.

Step 4: Nutralight Sensitive, to lock in moisture, soothe and rebalance the barrier. Use it to finish your routine in the morning; in the evening, apply it before 5 Complex Night.

Conclusion

Seasonal change is much more than a shift in the weather: it’s a stress test for your skin, especially if you have sensitive skin. A weakened barrier means not only cosmetic concerns, but also greater susceptibility to inflammation and redness.

Adapting your routine doesn’t 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 help you get through every seasonal change with fewer setbacks.

Frequently asked questions

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

Because these periods bring temperature fluctuations, changes in humidity and greater exposure to pollutants and UV rays, all of which 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 your usual cosmetics. These 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, favoring more hydrating and soothing formulas during transitional periods.

Should I stop using exfoliants?

If your skin is sensitized, it is advisable to reduce their frequency or stop using them temporarily 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 sulfur-rich 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