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Sensitive skin: what to avoid and why

In short

Sensitive skin reacts to a short, consistent list: fragrance, harsh surfactants, high pH, a few preservatives, and too many actives at once. Avoid those five and most of the stinging stops.

Avoid Choose Parfum Fragrance free Harsh surfactants Mild surfactants, lukewarm water Alkaline soap, pH 9 to 10 A pH-balanced cleanser, 4.7 to 5.5 Methylisothiazolinone Phenoxyethanol, up to 1% Several new actives at once One new product at a time

How common it is

Sensitive skin is not a diagnosis, but it is measurable and common. Pooled population surveys from several countries put it at:

Women reporting sensitive skin 60 to 70%
Men reporting sensitive skin 50 to 60%

Fragrance

Top of the list and the easiest to avoid. Fragrance is a mixture, often of dozens of compounds, listed under the single word Parfum. In patch tests of 3,119 adults from the general population, fragrance allergens were among the most frequent positives, with each of the two standard fragrance mixes sensitising close to 2% of adults. Sensitisation lasts for life.

Surfactants and pH

Cleansing is where sensitive skin suffers most. Surfactants bind to skin proteins and strip lipids, leaving the barrier drier and rougher; the mildest cleansers minimise both. Alkaline soap adds a second insult: untreated skin sits at a pH of about 4.7, and pushing it upward disturbs the enzymes and bacteria that keep the barrier intact. A pH-balanced cleanser in lukewarm water is the biggest single change most people can make.

Preservatives and pace

Preservatives are necessary, but not all are equal. Methylisothiazolinone caused a wave of contact allergy across Europe before its use in leave-on products was restricted; phenoxyethanol at up to 1% has a far better record. Exfoliating acids, retinoids and strong vitamin C each work and each can irritate. Sensitive skin usually reacts to the combination and the pace, not to any one of them.

The routine

  1. 1Fragrance free, always.
  2. 2A mild, pH-balanced cleanser, lukewarm water, 30 seconds.
  3. 3Calming ingredients with a record: panthenol for barrier repair, niacinamide for ceramides, glycerin and squalane to hydrate and soften.
  4. 4One new product at a time, at low frequency. Drop it if the skin objects.

Figures are study averages; individual skin varies. Patch-test any new product.

Sources (7)

  1. Farage MA. The prevalence of sensitive skin. Frontiers in Medicine, 2019. Review of population surveys.
  2. Diepgen TL et al. Prevalence of fragrance contact allergy in the general population of five European countries. British Journal of Dermatology, 2015. Patch-test study, n = 3,119.
  3. Ananthapadmanabhan KP et al. Cleansing without compromise: the impact of cleansers on the skin barrier and the technology of mild cleansing. Dermatologic Therapy, 2004. Review.
  4. Lambers H et al. Natural skin surface pH is on average below 5, which is beneficial for its resident flora. International Journal of Cosmetic Science, 2006. Measurement study, n = 330.
  5. Lundov MD et al. Methylisothiazolinone contact allergy: a review. British Journal of Dermatology, 2011. Review.
  6. Ebner F et al. Topical use of dexpanthenol in skin disorders. American Journal of Clinical Dermatology, 2002. Review.
  7. Tanno O et al. Nicotinamide increases biosynthesis of ceramides as well as other stratum corneum lipids to improve the epidermal permeability barrier. British Journal of Dermatology, 2000. Four-week clinical study.

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Sensitive skin: what to avoid and why