Layers of the skinDifferent types of follicles and their role in acneFollicle anatomyBarrier functionSkin and the immune systemAcne bacteria and the role of fatty acidsSkin inflammationHow acne developsInflammatory and non-inflammatory acneComedonal versus inflammatory acneScarringGenetics and acneHyperkeratosisKeloidsSensitive skinHormones role in acnePubertyPremenstrual breakoutsPregnancy and acnePerioral dermattitisBirth control pills and acneAcne and menopauseEnvironmental factorsWeather effects on the skinContact acneAcne detergicansOccupational acneGreasy work environmentsSteroids and acneContact acneDiet and acneCosmetic acneClient consultationProducts for homecareIn salon treatments