Sensitive Skin: Why It Reacts and How to Restore the Barrier

Sensitive skin reacts to things that are harmless to others. A new cream that stings for the first few seconds. Redness after a shower. The feeling of tightness that appears an hour after you moisturize. Itching without any apparent cause at the end of the day.

The most frustrating thing is the unpredictability: the same product you tolerated well for months starts to bother you for no reason. This happens because sensitivity is rarely a fixed trait — it is almost always a state of the skin barrier, and states change.

The Science: What is Actually Happening

The outermost layer of the skin acts like a brick wall: corneocytes are the bricks, and lipids — ceramides, cholesterol, and fatty acids — are the mortar that holds them together.

When that mortar degrades, microscopic gaps open up between cells. Two things happen simultaneously: water escapes faster (this is the feeling of tightness), and substances that would normally stay on the surface penetrate down to the nerve endings. Hence the stinging with products that didn't sting before.

From here, a cycle sets in: compromised barrier → increased penetration of irritants → inflammation → further degradation of lipids → even more fragile barrier. This is why sensitivity tends to worsen over time if it is not interrupted — and why the solution involves rebuilding, not adding more products.

The microbiome plays an underestimated role here. Beneficial bacteria produce the natural lactic acid that maintains the protective acidic pH. When this ecosystem is disturbed — by harsh cleansers, for example — the pH rises, and the environment begins to favor pro-inflammatory species.

Ingredients: What Makes it Worse

• Alcohol Denat. in the first ingredients — it is antimicrobial and selectively destroys cutaneous flora
• SLS and SLES — they remove lipids indiscriminately. There is measurable barrier disruption after 14 days of use
• Fragrance, synthetic or natural — the most frequent cause of contact reactions in cosmetics
• Essential oils — lavender, bergamot, citrus. "Natural" does not mean tolerated: linalool and eugenol are among the allergens legally required to be declared
• Physical exfoliation with irregular granules — micro-lesions on a barrier that is already compromised
• Hot water — dilates capillaries and accelerates water loss during washing

Ingredients: What Helps

• Ceramides — they literally rebuild the missing mortar. It is the only group that acts on the cause and not just the symptom
• Prebiotics (inulin, FOS) — they feed the beneficial flora and help restore the protective pH
• Niacinamide — stimulates ceramide synthesis and helps calm the appearance of redness
• Hyaluronic acid — hydrates without irritating; it does not repair the barrier, but it provides relief while it recovers
• Aloe vera and centella asiatica — soothing, they help reduce the appearance of redness and discomfort
• Panthenol — a humectant with a reparative effect on the barrier

The Routine, and What NOT to Use from Our Range

Morning: gentle cleansing or just lukewarm water → prebiotic serum → fragrance-free cream → mineral SPF

Night: cleansing milk or cleansing foam → prebiotic serum → night cream with ceramides

For occasional relief during reactive phases, the soothing facial oil applied over the cream seals and calms.

What to avoid from our own range

We would rather tell you this than sell you the wrong product:

• Gel with Niacinamide — niacinamide would be great for you, but this formula has alcohol and fragrance. For reactive skin, it's not worth it
• Exfoliating Tonic with Glycolic Acid — a small molecule that penetrates quickly. Too much for a compromised barrier
• Volcanic Sand Exfoliant — yes for the body, no for sensitive facial skin
• Clarifying Cleansing Gel — astringent, designed for tolerant oily skin

How to Introduce Products Without Provoking a Reaction

1. Tolerance test: apply to the inner forearm twice a day for 48 hours before using on the face
2. One product at a time, with four weeks between introductions. With three at the same time, if you react, you won't know which one caused it
3. Order: from the most fluid texture to the densest — serum, cream, oil, SPF
4. If there is persistent stinging beyond the first few seconds, wash it off and remove the product from your routine
5. Rebuilding takes time. During that period, less is more — adding products is the wrong instinct

When to See a Professional

Not all sensitivity can be solved with cosmetics. Book an appointment with a dermatologist if you have:

• Persistent redness with visible blood vessels — this may be rosacea, which has its own medical treatment
• Flaking with intense and recurring itching — this may be seborrheic dermatitis or eczema
• Reactions to practically everything, including fragrance-free products
• Sensitivity that appeared suddenly on skin that was never reactive
• No improvement even with a minimal, suitable, and consistently followed routine

A well-chosen cosmetic routine helps in all these cases, but it does not replace a diagnosis.

Frequently Asked Questions

Can sensitive skin use acids?

Yes, with discretion and only after the barrier has recovered. Start with lactic acid — it is the AHA with the largest molecule and is best tolerated — once a week, at night. If there is stinging or redness the next day, stop and try again weeks later.

Is sensitivity permanent?

In most cases, no. It is a state of the barrier, and the barrier regenerates. With a minimal routine and no irritants, many people regain tolerance with time and consistency. Structural sensitivity, associated with rosacea or eczema, does require continuous care.

Are "hypoallergenic" products safer?

Not necessarily. The term has no legal definition or uniform criteria — any brand can use it. What matters is the INCI list: the absence of fragrance, denatured alcohol, and essential oils.

Should I wash my face in the morning?

For sensitive skin, lukewarm water is often enough. During the night, the skin has not accumulated pollution or sunscreen that would justify surfactants. At night, cleansing is always necessary.

Can I use sunscreen if everything irritates me?

You must — and mineral filters (zinc oxide, titanium dioxide) are the best tolerated because they act on the surface by reflection instead of being absorbed. UV radiation degrades the barrier, so skipping SPF worsens sensitivity.

What is the difference between sensitive and sensitized skin?

Sensitive is a predisposition, often genetic and stable throughout life. Sensitized is an acquired state — skin that has become reactive due to over-exfoliation, too many active ingredients, or harsh cleansers. The latter is reversible and is much more common than people think.