Before choosing a skincare product, it is essential to understand why the skin is reacting. Sudden redness, a burning sensation or tingling often indicate a deeper imbalance linked to the skin barrier, the microbiome or microcirculation.
A weakened skin barrier: a loss of lipids, increased permeability, or a deficiency in ceramides or essential fatty acids can leave the skin more vulnerable to external aggressors (pollution, UV rays, heat). A 2024 review, for example, highlights the importance of restoring the skin barrier in the management of rosacea by supplying lipids and ceramides and avoiding irritants (1).
Low-grade inflammation or local immune activation: the release of pro-inflammatory mediators, vasodilation and nerve sensitisation sustain inflammatory responses in the skin.
Dysbiosis of the skin microbiota: when the balance between protective and pathogenic microorganisms is disrupted, the skin loses some of its natural defences. This disruption promotes the proliferation of opportunistic bacteria and amplifies reactions and sensations of heat (2).
Internal disturbances : oxidative stress, nutritional deficiencies, insufficient intake of omega-3s or certain other micronutrients, and disorders of the gut-skin axis are all internal factors that further compromise the skin’s resilience.
Triggering factors: exposure to the sun (UV), temperature fluctuations, wind, heat, the consumption of spicy foods and alcohol, and the use of harsh cosmetics can all exacerbate skin reactivity and trigger redness or a sensation of heat.
Vascular sensitivity: in cases of couperose and/or rosacea, the dilation of blood vessels, combined with a compromised barrier function, plays a key role (3): the skin becomes highly reactive, sometimes even to stimuli that are normally well tolerated.
In many cases, these mechanisms are intertwined: a weakened barrier promotes inflammation, which in turn disrupts the microbiome and exacerbates skin reactivity. This is why a holistic approach remains the most effective way to provide long-lasting relief for skin prone to redness or irritation.













