Cosmetic use of at least one probiotic microorganism (I), preferably Lactobacillus spp.and/or Bifidobacterium spp.or its fractions and/or metabolites, to reduce skin irritation, treat and prevent the manifestation of irritant contact dermatitis and/or treat skin disorders comprising irritation, is claimed. ACTIVITY : Dermatological. MECHANISM OF ACTION : Interleukin 8 production stimulator.